Definition of treacherous in English:

treacherous

adjective

  • 1Guilty of or involving betrayal or deception.

    ‘a treacherous Gestapo agent’
    ‘memory is particularly treacherous’
    • ‘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.’
    • ‘The left on Auckland City's council have become self-indulgent and treacherous to each other.’
    • ‘They are not deceitful or treacherous in their conduct and are faithful to their oaths and promises.’
    • ‘Josh had been promoted recently because of a treacherous betrayal by the old Number Four.’
    • ‘Philip found that following the logic of these conspiracy theories was deeply treacherous and disorienting.’
    • ‘I realise that he likes the tortured martyr parts in which he valiantly combats the treacherous world that seeks to subdue him.’
    • ‘Gone are interesting characters like the greedy and treacherous aide, and that marvelous biplane.’
    • ‘And behind that grinning face lay a treacherous, poisonous personality.’
    • ‘Is it treacherous to say I hope we lose every game in the World Cup?’
    • ‘They are a treacherous people who violate oaths and covenants.’
    • ‘The fate of the farm animals was so grim, the pigs so mean and mendacious and treacherous, the sheep so stupid.’
    • ‘But David says we should not be too confident that those people whose heads looked down from the bar were truly treacherous.’
    • ‘They are not anywhere near as treacherous as crack addicts or alcoholics for that matter.’
    • ‘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.’
    • ‘Rather than admit the great man is in fact a great flop, they label these dedicated economic soldiers as treacherous.’
    • ‘For example, he embodied animals that were weak, cowardly, false, and treacherous.’
    • ‘He proved a selfish, egocentric, ungrateful, and treacherous recipient of Noble's many kindnesses.’
    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’
      • ‘We made it to the top, but coming down was more treacherous.’
      • ‘My inertia in not pushing it backwards into a safe zone is as guilty for the shattered glass as the treacherous wind.’
      • ‘It resembles a treacherous dungeon, which is strange because one wall is entirely windows.’
      • ‘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.’
      • ‘If the Marina is known for its strong undercurrents, the sand on Elliots Beach is treacherous as it keeps shifting.’
      • ‘The earth is rich and dead, and offers treacherous footing.’
      • ‘I dragged myself up, hanging on to the treacherous railing, and lumbered up the stairs, bruised all over.’
      • ‘He parallels the paths of two very different figures, each coming of age and choosing a path in life during a treacherous time.’
      • ‘Many side roads were treacherous and remained so till Tuesday and several minor accidents occurred as a result.’
      • ‘It can be very treacherous and can give way at any time.’
      • ‘Weather conditions in the area at the time of the incident were described as treacherous by local emergency services.’
      • ‘I thought that in my years as a reporter I had navigated some fairly treacherous terrain.’
      • ‘A grieving family has pleaded for action to be taken on a treacherous bend that this week claimed the life of their mother.’
      • ‘On that day Couples' tee-shot to Golden Bell, the treacherous par three, clung miraculously to the bank of the Creek.’
      • ‘The road in Tunduffe has now gained such a high level of points that Gardai declare it treacherous and a serious accident risk.’
      • ‘The views open out to the north-east, across the treacherous Pentland Firth to Orkney, as you reach Portskerra pier.’
      • ‘The women worked the wind-swept fields while the men worked the quarries and manned fishing boats in famously treacherous seas.’
      • ‘Some 500,000 vessels a year pass through the treacherous, narrow Bosporus and Dardanelles straits.’
      • ‘The Garavogue is a fast-flowing treacherous river and we can do without those vandals who steal the ring buoys.’
      • ‘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/