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1. Dictionary

   Treach·er·ous

   /ˈtreCH(ə)rəs/

   

   adjective

   • 1. guilty of or involving betrayal or deception: "a treacherous Gestapo agent" Similar traitorousdisloyalperfidiousfaithlessunfaithfulduplicitousfalse-hearteddeceitfulfalseuntruebackstabbingdouble-crossingdouble-dealingtwo-facedJanus-faceduntrustworthyunreliableundependablefickleapostaterenegadesubversiveseditiousrebelliousmutinousbreakawaytreasonabletreasonousinformal:two-timingrare:PunicOpposite loyalfaithful
   • ▪ (of ground, water, conditions, etc.) hazardous because of presenting hidden or unpredictable dangers: "a vacationer was swept away by treacherous currents" Similar dangeroushazardousperilousunsafeprecariousriskydeceptiveunreliableundependableunstableicyice-coveredslipperyglassyinformal:diceyhairyslippygnarlyOpposite safereliable

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

   Derivatives

   • 1. treacherously adverb
   • 2. treacherousness noun

   Scrabble Points: 16

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2. www.dictionary.com › browse › treacherousTREACHEROUS Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › treacherous

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   Treacherous definition: characterized by faithlessness or readiness to betray trust; traitorous. . See examples of TREACHEROUS used in a sentence.

3. www.merriam-webster.com › thesaurus › treacherousTREACHEROUS Synonyms: 65 Similar and Opposite Words - ...

   www.merriam-webster.com › thesaurus › treacherous

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   Synonyms for TREACHEROUS: traitorous, unreliable, false, disloyal, perfidious, faithless, fickle, unfaithful; Antonyms of TREACHEROUS: constant, loyal, true, faithful, steadfast, responsible, steady, fast.

4. www.vocabulary.com › dictionary › treacherousTreacherous - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › treacherous

   Treacherous means either not trusted or dangerous. A treacherous road might be icy or otherwise likely to cause a car accident. A treacherous friend will betray you. Treachery refers to harmful acts you might do to someone who trusts you.

5. www.oxfordlearnersdictionaries.com › definition › englishtreacherous adjective - Definition, pictures, pronunciation and...

   www.oxfordlearnersdictionaries.com › definition › english

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   Definition of treacherous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

6. www.collinsdictionary.com › us › dictionaryTREACHEROUS definition in American English | Collins English...

   www.collinsdictionary.com › us › dictionary

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   Apr 30, 2024 · If you describe someone as treacherous, you mean that they are likely to betray you and cannot be trusted. [ disapproval ] He publicly left the party and denounced its treacherous leaders.

7. dictionary.cambridge.org › dictionary › learner-englishTREACHEROUS | meaning - Cambridge Learner's Dictionary

   dictionary.cambridge.org › dictionary › learner-english

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   TREACHEROUS definition: 1. very dangerous, especially because of bad weather conditions: 2. If someone is treacherous…. Learn more.

8. www.thefreedictionary.com › treacherousTreacherous - definition of treacherous by The Free Dictionary

   www.thefreedictionary.com › treacherous

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   adj. 1. characterized by faithlessness or readiness to betray trust. 2. deceptive, untrustworthy, or unreliable. 3. unstable or insecure, as footing. 4. dangerous; hazardous: a treacherous climb. treach′er•ous•ly, adv. treach′er•ous•ness, n.