Definition of treacherous in English:

treacherous

adjective

  • 1Guilty of or involving betrayal or deception.

    ‘a treacherous Gestapo agent’
    ‘memory is particularly treacherous’
    • ‘He proved a selfish, egocentric, ungrateful, and treacherous recipient of Noble's many kindnesses.’
    • ‘The left on Auckland City's council have become self-indulgent and treacherous to each other.’
    • ‘Rather than admit the great man is in fact a great flop, they label these dedicated economic soldiers as treacherous.’
    • ‘The fate of the farm animals was so grim, the pigs so mean and mendacious and treacherous, the sheep so stupid.’
    • ‘I realise that he likes the tortured martyr parts in which he valiantly combats the treacherous world that seeks to subdue him.’
    • ‘Josh had been promoted recently because of a treacherous betrayal by the old Number Four.’
    • ‘When the robber opened the note and read what the king had written, he realized the king had devised a treacherous plan.’
    • ‘The earliest documented ballads feature Robin Hood as lusty, treacherous and violent.’
    • ‘He's deposed by a treacherous underling, winds up on the street, and is taken in by a tough noodle vendor with messed up teeth.’
    • ‘For example, he embodied animals that were weak, cowardly, false, and treacherous.’
    • ‘But David says we should not be too confident that those people whose heads looked down from the bar were truly treacherous.’
    • ‘Is it treacherous to say I hope we lose every game in the World Cup?’
    • ‘And behind that grinning face lay a treacherous, poisonous personality.’
    • ‘They are a treacherous people who violate oaths and covenants.’
    • ‘They are not anywhere near as treacherous as crack addicts or alcoholics for that matter.’
    • ‘Gone are interesting characters like the greedy and treacherous aide, and that marvelous biplane.’
    • ‘They are not deceitful or treacherous in their conduct and are faithful to their oaths and promises.’
    • ‘Philip found that following the logic of these conspiracy theories was deeply treacherous and disorienting.’
    traitorous, disloyal, perfidious, faithless, unfaithful, duplicitous, false-hearted, deceitful, false, untrue, back-stabbing, double-crossing, double-dealing, two-faced, janus-faced, untrustworthy, unreliable, undependable, fickle
    View synonyms
    1. 1.1 (of ground, water, conditions, etc.) hazardous because of presenting hidden or unpredictable dangers.
      ‘a vacationer was swept away by treacherous currents’
      • ‘He parallels the paths of two very different figures, each coming of age and choosing a path in life during a treacherous time.’
      • ‘It resembles a treacherous dungeon, which is strange because one wall is entirely windows.’
      • ‘The road in Tunduffe has now gained such a high level of points that Gardai declare it treacherous and a serious accident risk.’
      • ‘It can be very treacherous and can give way at any time.’
      • ‘We made it to the top, but coming down was more treacherous.’
      • ‘The views open out to the north-east, across the treacherous Pentland Firth to Orkney, as you reach Portskerra pier.’
      • ‘The Garavogue is a fast-flowing treacherous river and we can do without those vandals who steal the ring buoys.’
      • ‘Many side roads were treacherous and remained so till Tuesday and several minor accidents occurred as a result.’
      • ‘The descent is worse, in parts a sheer drop on a thin track almost hidden by heather with treacherous rocks and holes ready to trip up even the most nimble feet.’
      • ‘The earth is rich and dead, and offers treacherous footing.’
      • ‘The women worked the wind-swept fields while the men worked the quarries and manned fishing boats in famously treacherous seas.’
      • ‘Weather conditions in the area at the time of the incident were described as treacherous by local emergency services.’
      • ‘I dragged myself up, hanging on to the treacherous railing, and lumbered up the stairs, bruised all over.’
      • ‘If the Marina is known for its strong undercurrents, the sand on Elliots Beach is treacherous as it keeps shifting.’
      • ‘A grieving family has pleaded for action to be taken on a treacherous bend that this week claimed the life of their mother.’
      • ‘My inertia in not pushing it backwards into a safe zone is as guilty for the shattered glass as the treacherous wind.’
      • ‘I thought that in my years as a reporter I had navigated some fairly treacherous terrain.’
      • ‘On that day Couples' tee-shot to Golden Bell, the treacherous par three, clung miraculously to the bank of the Creek.’
      • ‘Some 500,000 vessels a year pass through the treacherous, narrow Bosporus and Dardanelles straits.’
      • ‘As the treacherous winter months lie ahead, let's not wait for more alarming statistics to bring us to our senses.’
      dangerous, hazardous, perilous, unsafe, precarious, risky, deceptive, unreliable, undependable, unstable
      View synonyms

Origin

Middle English (in treacherous (sense 1 of the adjective)): from Old French trecherous, from trecheor ‘a cheat’, from trechier ‘to cheat’.

Pronunciation

treacherous

/ˈtreCH(ə)rəs//ˈtrɛtʃ(ə)rəs/