Definition of mouth in English:



Pronunciation /maʊθ//mouTH/
  • 1The opening in the lower part of the human face, surrounded by the lips, through which food is taken in and from which speech and other sounds are emitted.

    • ‘He lowered his mouth to her shoulder blade, running his lips lightly over the skin.’
    • ‘Cindy wiped her mouth with a napkin and slid her empty plate away from her.’
    • ‘Her wide mouth was twisted into a sneering frown.’
    • ‘You can tickle your baby's chin or lower lip so the baby will open its mouth.’
    • ‘The girl's mouth dropped slightly, as she recognized him.’
    • ‘As he looked right at me, cigarette teetering on his lower lip with his mouth slightly open, he didn't flinch.’
    • ‘Suddenly her petal pink mouth was on mine and I was in heaven.’
    • ‘Her rosebud mouth curved gently into a smile.’
    • ‘He downed the rest of the wine and wiped his mouth with the back of his hand.’
    • ‘I yawned widely, and covered my open mouth with my hand.’
    • ‘His mother's mouth twitched in annoyance at the mention of the name.’
    • ‘The corners of the other boy's mouth twitched up.’
    • ‘She gasped, her skin paled as she covered her gaping mouth and she backed away.’
    • ‘Exerting an absurd amount of force, I clamped my gaping mouth closed.’
    • ‘One, taken in 1874 from slightly above, is of Ned unshaven, with thin mouth, narrow eyes, and the pinch of poverty.’
    • ‘She tried to scream but the hand over her mouth contained a cloth, which seemed to muffle the noise.’
    • ‘That person was peering up at her from the first bench and her tiny mouth was set in a hard straight line.’
    • ‘He stared at me with his darkly speculative eyes and down-turned mouth.’
    • ‘Kate shouted as she covered the young woman's mouth with a gloved hand.’
    • ‘Brittany patted her mouth with her napkin and laid it neatly on her lap.’
    lips, jaws
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    1. 1.1 The opening through which an animal takes in food, corresponding to the human mouth.
      ‘the carp picks up the bait by sucking it into its mouth’
      • ‘Numerous bacterial and fungal species have been cultured from the mouths of alligators.’
      • ‘These beasts often have enormous mouths and needlelike fangs.’
      • ‘The taste buds of the lake sturgeon protrude from the toothless mouth and are used to help in the selection of food.’
      • ‘Those that survive to become tadpoles often have misshapen mouths and are unable to feed properly.’
      • ‘Once the male has fertilized a clutch of eggs, he carries them in his mouth for one to two weeks, until they hatch.’
      • ‘Once a snake seizes a victim in its mouth, it coils itself around the body.’
      • ‘Other fish have developed huge mouths and fangs so that they can eat practically whatever food they come across.’
      • ‘They are aggressive fish, sometimes known to take food right out of the mouths of feeding sharks.’
      • ‘Nightjars have large heads and eyes and exceedingly wide mouths, used as scoops for catching insects in midair.’
      • ‘Silk moth cocoons are made of a layer of silk that the caterpillar exudes from glands in its mouth.’
      • ‘This fish is recognized by its short broad snout with four barbels closer to the tip of the snout than the mouth.’
      • ‘In some vultures, the adults instead regurgitate food into the mouths of the chicks.’
      • ‘Their trunk is employed to pull branches off trees, uproot grass, pluck fruit, and to place food in their mouths.’
      • ‘In addition to two eyes and a mouth, this animal has markings suggesting gills.’
      • ‘Young fish have been observed clinging to their parents with their mouths, even after they are able to swim freely.’
      • ‘Step three is to get the brush with paste into your dog's mouth and all the teeth brushed.’
      • ‘Their mouths have been adapted for biting, making them efficient hunters.’
      • ‘The other reason so many species co-exist on the grassland is also reflected in the structure of the animal's mouths.’
      • ‘They have fleshy tentacles located above their eyes and below their mouths.’
      • ‘A ray eats its prey by grabbing the mollusk in its mouth and crushing the shell with its jaws.’
    2. 1.2usually with adjective A horse's readiness to feel and obey the pressure of the bit in its mouth.
      ‘the horse had a hard mouth’
      • ‘The horse with the hard mouth almost immediately begins to lean on the bit.’
      • ‘A horse with a hard mouth is basically immune to the amount of pressure given by the bit.’
      • ‘A horse should accept the bit and chew it softly, that is a sign of an alive responsive mouth.’
      • ‘Another thing he looks for is a deep mouth as this will aid him later on in the training.’
      • ‘He has a fairly soft mouth as most of the time while riding I only need to use a very light contact.’
    3. 1.3 The character or quality of a wine as judged by its feel or flavor in the mouth (rather than its aroma)
      • ‘This medium bodied wine's mouth is filled with a carry over of the nose's raspberries and strawberries.’
      • ‘The mouth of the wine is full bodied with flavors of ripe berries and soft, supple fine grained tannins.’
    4. 1.4informal Talkativeness or impudence.
      ‘you've got more mouth on you than anyone I've ever known’
      • ‘I am surprised you never came to visit me at my gym when you were training in Las Vegas since you have so much mouth when it comes to me.’
      • ‘She had a bit too much mouth and not enough brain.’
      • ‘‘He's got a lot of mouth,’ said Miranda.’
      impudence, cheek, cheekiness, insolence, impertinence, effrontery, audacity, audaciousness, boldness, presumption, presumptuousness, sauciness, incivility, rudeness, disrespect
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  • 2An opening or entrance to a structure that is hollow, concave, or almost completely enclosed.

    ‘standing before the mouth of a cave’
    • ‘The frail man simply shook his head and headed for the mouth of the cave.’
    • ‘The cave mouth was high up on the cliff face.’
    • ‘During the night, a number of spiders came and wove their webs all across the mouth of the cave.’
    • ‘He pointed to the dark mouth of another underwater cave.’
    • ‘We then walked a few kilometres to the mouth of a small cave, which, as I was to find out, went deep into the mountain.’
    • ‘On the opposite bank, just 30 ft from the river and six feet above its normal level, is the wide mouth of the cave.’
    • ‘The clouds parted and the party emerged from the mouth of the small cave.’
    • ‘The cave is fully 60 feet deep and there are a couple of routes that climb up and around the mouth of this cave.’
    • ‘Close to the cave mouth, portable generators can be used to power electric lights.’
    • ‘He sees a movement up there, on the slope, near the mouth of the cave.’
    • ‘The plastic screen Ian had constructed across the mouth of the cave wasn't enough to keep the dust out.’
    • ‘There was a stone bridge curving over the creek leading to a wide mouth of a small cave.’
    • ‘When we got to the cave mouth, I got this uncanny feeling like I'd been there before.’
    • ‘Everything was packed, save for her blankets, and the others were gathered at the mouth of the cave.’
    • ‘In the old days a man would have sent a gun boat, shown them the glint of cold steel, perhaps blown a few from the mouth of a cannon as an example to the rest.’
    • ‘Nothing could be found and the party were on the point of giving up when a soldier spotted soap suds in the sea near the mouth of a cave.’
    • ‘A plastic foam trapdoor covered the mouth of the narrow hole.’
    • ‘Better results could be obtained by clamping them to the mouths of cannon, and blowing them to pieces.’
    • ‘The Shrine is within a massive cave, the mouth of which is about 150 ft wide.’
    • ‘The party arrived at the mouth of the cave, and Adrian explained the mission.’
    entrance, opening, entry, way in, entryway, inlet, access, ingress
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    1. 2.1 The opening for filling or emptying something used as a container.
      ‘the mouth of the bottle’
      • ‘Ben pulled the cork from the mouth of the bottle and leaned forward to help Will drink.’
      • ‘But she just blows them a kiss and licks the froth from the mouth of the bottle.’
      • ‘From the mouths of the bottles, big drops of water pop up in time to a complex, computer-controlled, choreographed program.’
      • ‘She put her lips apprehensively to the mouth of the bottle, and took a large gulp.’
      • ‘The other uncorks a bottle of chilled beer, and after cleaning the mouth of the bottle with her tongue, she places the beer in my hand.’
      • ‘Madeleine noticed a few of the red drops on the cream carpet near the mouth of the bottle.’
      • ‘Glasses with a wide bowl that tapers toward the mouth will allow the aroma of the wine to be released generously.’
      • ‘It fits the mouth of the container and is locked tightly.’
      opening, rim, lip
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    2. 2.2 The muzzle of a gun.
      • ‘It was the cold mouth of the gun against my temple as I sat behind the wheel of my car that alerted me to the fact that it was indeed a hijack.’
      • ‘The second mass of shot is placed in a wad with its base pointing towards the gun mouth, in the direction of firing.’
      • ‘He passed the anti-aircraft ships at less than mast height in the very mouths of their guns and launched a torpedo at point blank range.’
    3. 2.3 The place where a river enters the sea.
      • ‘New Orleans is a city built on silt and drained marshland, positioned at the mouth of the Mississippi River.’
      • ‘A local man says that there is a small village named Adventure near the mouth of a river.’
      • ‘One late afternoon at low tide a hundred big sharks passed the beach near the mouth of a tidal river in a feeding frenzy.’
      • ‘Eleven days later the main party reached the mouth of the Yellowstone River and camped there.’
      • ‘River mouths are dangerous places.’
      • ‘The coastal boundary cuts across the mouths of all rivers and streams.’
      • ‘The local governor was asked by the French commander if it would be allowed to fire a salute as it entered the mouth of the river.’
      • ‘Columbia was named after a sailing vessel that operated out of Boston in 1792 and explored the mouth of the Columbia River.’
      • ‘Pilots are qualified professionals who know the river well enough to guide ships through the dangerous sand banks around the mouth of the river.’
      • ‘In winter, the Mew Gull inhabits coastal waters, and is commonly found in estuaries, river mouths, and freshwater ponds close to the shore.’
      • ‘In a separate incident, a teenager had to be rescued from mud flats at the mouth of the River Wyre.’
      • ‘As silt increasingly built up at the river mouth, large ships had to anchor further and further out at sea.’
      • ‘Round the headland a pair of towers safeguard a river mouth curling into a distant and indistinct sea.’
      • ‘Fish farmers are also under fire over siting farms close to river mouths.’
      • ‘Villages were usually close to the sea and the mouth of a river.’
      • ‘The mouth of the river dumps into Moreton Bay and the Pacific Ocean in northeastern Australia.’
      • ‘Already by 1760 some upriver communities were calling on the Nova Scotia government to restrict net fishing at the mouths of rivers.’
      • ‘Numerous little port towns grew up at river mouths.’
      • ‘Anglers in South Africa still target sharks, especially off the long beaches facing the Indian Ocean and in river mouths and estuaries after heavy rain.’
      • ‘Belfast sits at the mouth of the river Lagan and is encircled by green rolling hills.’
      outfall, outlet, debouchment, embouchure, debouchure
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    4. 2.4 The opening or entrance to a harbor or bay.
      ‘walking to the mouth of the bay to absorb the view’
      • ‘Icebergs would languidly crumble to nothing just outside the mouth of the harbour.’
      • ‘Being out on deck is even more of a pleasure as you head out of the mouth of the bay.’
      • ‘Seas at the mouth of the bay were cresting at 10 feet.’
      • ‘The largest rock, Big Black Carr, can be seen at the seaward extremity of St Abbs Bay, as you look out from the harbour mouth.’
      • ‘The ship was being towed and had completed a two weeks voyage from Russia when it spent its first night anchored in the mouth of the bay.’
      • ‘Otters are now spread across large swathes of the region and have even been spotted swimming in the mouth of Whitby harbour.’
      • ‘There was even a galleon lurking near the mouth of the harbour, ostensibly harmless.’
      • ‘If your boat has come up the coast along the Delaware shore, you'll have no choice but to make the run across the bay's mouth.’
      • ‘Wind over tide conditions at the mouth of Cork Harbour resulted in huge breaking seas over 20 ft high.’
      • ‘I felt woefully under waterproofed to face the weather beyond the harbour mouth.’
      • ‘He was able to describe a pattern of lights which seemed to place the yacht within sight of the harbour mouth.’
      • ‘The tidal currents across the bay mouth are effectively pushing the water in the bay round in a large circle.’
      • ‘It is expected to arrive at the mouth of Cork Harbour next Friday where it will be winched into the water.’
      • ‘Eventually, as I near the harbour mouth, a rescue launch roars out to meet me and tows me in.’
      • ‘There are five wrecks in all and they lie in the mouth of the old harbour, so the only way of safely diving on them is by boat.’
      • ‘The largest trawler in the Dingle fleet, the Emerald Dawn, was grounded at the mouth of the harbour in early July.’
      • ‘Aitchison argues that had the harbour mouth been widened, more of the boats would have stood a chance of making it to safety.’
      • ‘An earth embankment was built across the harbour mouth to protect the ships from the weather, and a castle was constructed at the top of the hill.’
      • ‘As they got to the mouth of New York harbour, they got into difficulties and requested assistance.’
      • ‘That evening we set off to fish the harbour mouth from the rock wall.’


Pronunciation /maʊð//mouT͟H/
  • 1Say (something dull or unoriginal), especially in a pompous or affected way.

    ‘this clergyman mouths platitudes in breathy, soothing tones’
    • ‘He is merely mouthing an administrator's script.’
    • ‘Now she mouths all the normal platitudes about how the Real Message of the Gospel is Social Justice.’
    • ‘They shriek, they mouth inanities in the commentary box and on the stands.’
    • ‘But such actors cannot be expected to mouth Marxist slogans convincingly.’
    • ‘The guy is just sitting on his hands, while mouthing platitudes.’
    • ‘Instead of mouthing platitudes about creating just and lasting settlements, we must turn the financial screws on both parties to make them see sense.’
    • ‘Both of them are currently mouthing the proper platitudes.’
    • ‘When he says he expects to win, he will likely be speaking out of sincere conviction, not simply mouthing platitudes like many other candidates.’
    • ‘They mouth slogans and psychobabble.’
    • ‘They were content to mouth the slogans and go through the motions.’
    • ‘The company quickly reverted to the more standard practice of mouthing platitudes instead of the bald-faced truth.’
    • ‘Repent, they admonish, and come back to signing agreements and mouthing platitudes.’
    • ‘She said that people should be wary of mouthing platitudes.’
    • ‘The environment minister is being condemned for mouthing politically correct platitudes.’
    • ‘Realistic promotion of abstinence is not the mere mouthing of platitudes such as ‘Just say ‘No’!’’
    utter, speak, say
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    1. 1.1 Utter very clearly and distinctly.
      ‘she would carefully mouth the right pronunciation’
      • ‘I, in turn, pointed at myself and just as clearly mouthed out my name, ‘Lani’.’
      • ‘His teacher was mouthing each letter sound and having him repeat sequences.’
      • ‘By the end of the lesson students are carefully mouthing the correct English pronunciation.’
      • ‘Emily mouthed the words carefully as she faced him. ‘Thank you so much, Mr. Smith.’’
      utter, speak, say
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    2. 1.2 Move the lips as if saying (something) or in a grimace.
      ‘she mouthed a silent farewell’
      with direct speech ‘“Come on,” he mouthed’
      • ‘His lips began moving rapidly, mouthing the words to a prayer.’
      • ‘My eyes moved to his lips which were silently mouthing the words to the song.’
      • ‘With a labored breath, his pale, chapped lips mouthed her name.’
      • ‘Then before he was led out of the courtroom, he sneered at the media and mouthed the words ‘go home‘.’
      • ‘He stood expressionless in the dock, shaking his head and mouthing the word ‘no’ when asked if he had anything to say.’
      • ‘He nodded when he heard her and mouthed back an ‘Alright’.’
      • ‘Tess mouthed silent thanks and blinked back tears.’
      • ‘She'd sat quietly as her father drove her to the hospital, wringing her hands in her lap and mouthing silent prayers for Mark.’
      • ‘She mouths the word as if she can't bring herself to say it aloud.’
      • ‘Settling into a plastic chair, he became engrossed, silently mouthing the words as he read.’
      • ‘Luke shook his head and silently mouthed the word ‘no’.’
      • ‘I clambered back on stage, mouthing What the hell?’
      • ‘As Erik stood up, Maria silently mouthed the words ‘I'm sorry’ to him.’
      • ‘I can remember her looking at me and mouthing the words ‘I don't want to die’.’
      • ‘Some mouthed silent words of thanksgiving while others joyfully praised the God of creation.’
      • ‘Mel mouthed the word ‘FAREWELL’ to him as she waved.’
      • ‘Quickly Matt mouthed a silent thank you to Kiara, who nodded in acceptance.’
      • ‘Maddy mouthed a thank you to her friend as they left and she nodded back.’
      • ‘He raises his palms skyward and mouths a silent prayer.’
      • ‘He mouthed an obscenity as he was led away.’
  • 2Take in or touch with the mouth.

    ‘puppies may mouth each other's collars during play’
    • ‘I put a drop noseband or something similar on the horse to stabilize his jaw so that the game of nipping or mouthing me just never even gets started.’
    • ‘Puppies like to mouth their owners' hands.’
    • ‘Dogs tend to mouth each other when playing.’
    • ‘My baby likes mouthing and chewing hard veggies.’
    1. 2.1 Train the mouth of (a horse) so that it responds to a bit.
      • ‘If you're mouthing a young horse for the first time, start out by getting a few really good training books.’
      • ‘Mouthing a pony is the initial stage of breaking a pony and getting him to get used to the fact that he is going to be ridden.’
      • ‘The horse was mouthed properly as a youngster.’


  • a mouth to feed

    • A person, typically a child, who has to be looked after and fed.

      ‘how can they afford another mouth to feed?’
      • ‘With less income, many prospective mothers fear another mouth to feed.’
      • ‘Her step father gloated about how he got rid of a mouth to feed and how he didn't have to pay taxes for another three years!’
      • ‘It does not matter to him now whether or not the baby is male or female because it would just be one more mouth to feed.’
      • ‘For me, you are a mouth to feed, less important than the donkey.’
      • ‘I would rather not have another mouth to feed.’
  • be all mouth (and no trousers)

    • informal Tend to talk boastfully without any intention of acting on one's words.

      • ‘He said that local politicians ‘were all mouth and no action’ on the issue and surely they could be doing more.’
      • ‘He has acquired a bit of a reputation for being all mouth and no trousers.’
      • ‘He could never be accused of being all mouth and no trousers.’
      • ‘‘I guess it's just another case of a man who's all mouth and no trousers…’ I giggle, before climbing the stairs to my sanctuary.’
      • ‘As far as I am concerned she is all mouth and no trousers.’
      • ‘Paul is being given advice about what to do on a date from his been-there-done-that pal Troy, who is all mouth and no trousers.’
      • ‘Sadly, like many a learnèd professional, she was all mouth and no backbone.’
      • ‘We all know that down in London they are all mouth and no trousers.’
      • ‘Were they a serious threat or all mouth and no trousers?’
      • ‘As far as I am concerned, she is all mouth and no trousers.’
      boasting, bragging, empty talk, idle talk, bombast, fustian
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  • keep one's mouth shut

    • informal Not say anything, especially not reveal a secret.

      ‘would he keep his mouth shut under interrogation?’
      • ‘I could have kept my mouth shut but I felt I needed to speak out.’
      • ‘I have respect for someone that gets caught and keeps his mouth shut.’
      • ‘He didn't want to say anything, so he kept his mouth shut.’
      • ‘Don't sign anything, keep your mouth shut, and remember that we never had this conversation.’
      • ‘I've kept my mouth shut through all of this stuff.’
      • ‘I now regret the entire business and wish I'd kept my mouth shut.’
      • ‘I kept my mouth shut on the advice of my attorneys.’
      • ‘I've kept my mouth shut about this until now, as it's not very pleasant.’
      • ‘You kept your mouth shut or you were killed.’
      • ‘If I had kept my mouth shut then I would probably not have had all this hassle.’
      say nothing, keep quiet, not breathe a word, not tell a soul, not give the game away, keep it under one's hat
      View synonyms
  • open one's mouth

    • informal Say something.

      ‘sorry, I'll never open my mouth about you again’
      • ‘Next time you open your mouth to react to something, think twice.’
      • ‘You didn't even manage to get accurate information before you opened your mouth.’
      • ‘After spending a great deal of the 1990s making speeches on education, I took a vow never to open my mouth on the subject again, at least in public.’
      • ‘A middle-aged woman who had seen the killing of a bail bondsman by a drug gang leader, was so scared she could not open her mouth on the stand.’
      • ‘I try to assume less before opening my mouth or offering information.’
  • watch one's mouth

    • Be careful about what one says.

      • ‘You should watch your mouth when there is a lady present.’
      • ‘‘Todd Alexander, watch your mouth in front of your mother,’ Rob snapped.’
      • ‘I know damn well what I'm saying, and no way in hell am I watching my mouth.’
      • ‘I was the one who made sure that he watched his mouth in interviews.’
      • ‘I should also warn you to watch your mouth around him.’
      • ‘Please watch your mouth around here, young lady.’
      • ‘I'd watch your mouth if I were you.’
      • ‘You'll learn to watch your mouth when talking to me.’
      • ‘In the locker-room, too, he will have to watch his mouth.’
      • ‘After warning him to watch his mouth once again he walked off with his dogs.’

Phrasal Verbs

  • mouth off

    • 1Talk in an unpleasantly loud and boastful or opinionated way.

      ‘he was mouthing off about society in general’
      • ‘He skips school constantly and, on the handful of days he does show up, he's either mouthing off or getting into big-time, black-eye fights.’
      • ‘My nice neighbours the other side said that she'd been in there, mouthing off about her partner and asking for drink.’
      • ‘Nobody shows off or mouths off quite as good as a Leo.’
      • ‘When he mouths off to a pretty young teacher, he apologizes: ‘I'm sorry I sounded off on you.’’
      • ‘If TV cameras catch him spitting or swearing, you can bet that some retired cop, headmaster or right-wing politician will be mouthing off to the Monday papers about sloppy role models and the decline of civilisation.’
      • ‘If your father mouths off to you about it, just remind him that he lives in your house and has to respect your rules now.’
      • ‘If a kid mouths off, maybe he doesn't like you or maybe he's seen his mother beaten up by her boyfriend.’
      • ‘About half of them were prone to not listening to orders and mouthing off.’
      • ‘‘You're always mouthing off about things,’ one of my friends told me the other day as I launched an attack on the cost of school trips these days.’
      • ‘He was mouthing off about something he knows nothing about.’
      • ‘I'm sick of her mouthing off about me.’
      • ‘There were loads of lads mouthing off.’
      • ‘There is nothing wrong with people mouthing off on a radio talk show.’
      • ‘I'm checking in with her today, and instead of mouthing off on what I think she should do, I'm just going to listen.’
      • ‘She was overheard mouthing off about her rival.’
      • ‘Kids learn how to be mature only by mouthing off to any authority figure they can.’
      • ‘Maybe they've had a big boost in fundraising since he started mouthing off so publicly.’
      • ‘He was then booked for mouthing off to the assistant referee.’
      • ‘He was just as into the avant-garde, but he was exploring it rather than mouthing off about it.’
      • ‘I wondered about how many of them actually think like they purport to rather than simply mouthing off in this obnoxious way simply to wind people up.’
      rant, spout, declaim, rave, jabber, sound off
      View synonyms
      1. 1.1Loudly criticize or abuse.
        • ‘Never again, did Sean ever mouth off at him.’
        • ‘He thought that perhaps it wouldn't be such a smart idea to mouth off at the person holding the gun.’
        • ‘When Mr Godfrey started mouthing off at Sergeant Newell, he made us go with him to the station.’
        • ‘After mouthing off at her, they turned it down a little bit, then a minute later cranked it up even louder than it was originally.’
        • ‘They are often petty offenders - kids who have been caught shoplifting, mouthing off at police, or using drugs a couple of times, for example.’
        • ‘He was sent to cool off in the sin bin for mouthing off at the referee.’
        • ‘It was confirmed when you didn't mouth off at me earlier.’
        • ‘He mouths off at the ref, but can't even get a booking.’
        • ‘She's been like that ever since Lea turned around and started mouthing off at me.’
        • ‘He was only taken to the station because he mouthed off at a cop.’
        • ‘They're busy mouthing off at each other.’
        • ‘And so when someone blows up and mouths off at a guard or goes after somebody else about their kids, I totally understand where that emotion and that lightning-fast trigger comes from.’
        • ‘Some guy mouths off at him and they begin brawling.’
        • ‘Before I get the chance to mouth off at her, she's in my face.’
        • ‘Then a person came across in a boiler suit and started mouthing off at us.’
        • ‘She had had to endure being mouthed off at all her childhood.’
        • ‘He refused to go quietly, mouthing off at the coach as he made his way to the dressing room.’
        • ‘I thought you'd have mouthed off at the guards until they beat you to death.’
        • ‘You can't just go mouthing off at people for making simple mistakes.’
        • ‘She immediately got up and began mouthing off at the guy who had knocked me over.’


Old English mūth, of Germanic origin; related to Dutch mond and German Mund, from an Indo-European root shared by Latin mentum ‘chin’.