Definition of treacherous in English:

treacherous

Syllabification: treach·er·ous
Pronunciation: /ˈtreCH(ə)rəs
 
/

adjective

1Guilty of or involving betrayal or deception: a treacherous Gestapo agent memory is particularly treacherous
More example sentences
  • Josh had been promoted recently because of a treacherous betrayal by the old Number Four.
  • For example, he embodied animals that were weak, cowardly, false, and treacherous.
  • They are not deceitful or treacherous in their conduct and are faithful to their oaths and promises.
Synonyms
1.1(Of ground, water, conditions, etc.) hazardous because of presenting hidden or unpredictable dangers: a vacationer was swept away by treacherous currents
More example sentences
  • My inertia in not pushing it backwards into a safe zone is as guilty for the shattered glass as the treacherous wind.
  • On that day Couples' tee-shot to Golden Bell, the treacherous par three, clung miraculously to the bank of the Creek.
  • The views open out to the north-east, across the treacherous Pentland Firth to Orkney, as you reach Portskerra pier.
Synonyms

Origin

Middle English (in the sense 'involving betrayal'): from Old French trecherous, from trecheor 'a cheat', from trechier 'to cheat'.

Derivatives

treacherously

adverb
More example sentences
  • As it was, hopeful rather than thoughtful balls were plummeted into a two man full-forward line that had virtually no chance of securing possession given the tendency of the ball to skid away from them on the treacherously greasy surface.
  • It rained heavily during the afternoon, which made the stages very muddy and treacherously slippy.
  • I defy anyone who hasn't read the book to decipher this film, to understand the implications, motivations and emotional complexities of a story dependent on treacherously subtle codes of conduct.

treacherousness

noun
More example sentences
  • The introduction speaks of the harshness and treacherousness of the Antarctic - so much so that I actually felt a chill.
  • Fairbanks is made out to be a pretty dangerous town with flights in the winter operating perhaps only a few times a week due to the difficulty and treacherousness of getting around the ice fog.
  • Thus far, their collected data confirm the treacherousness of the bottom.

Definition of treacherous in:

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Pronunciation: ˌimpyəˈdisitē
noun
lack of modesty