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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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   deceptive, untrustworthy, or unreliable. Synonyms: deceitful. Antonyms: reliable. unstable or insecure, as footing. dangerous; hazardous: a treacherous climb. treacherous. / ˈtrɛtʃərəs / adjective. betraying or likely to betray faith or confidence. unstable, unreliable, or dangerous. treacherous weather. treacherous ground. Discover More.

3. 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. It can also refer to being disloyal to your native country, but the word treason is more common in this sense.

4. www.collinsdictionary.com › dictionary › englishTREACHEROUS definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   4 days ago · If you say that something is treacherous, you mean that it is very dangerous and unpredictable . The current of the river is fast flowing and treacherous. They made the treacherous journey across stormy seas in rotten boats. Synonyms: dangerous, tricky, risky, unstable More Synonyms of treacherous. Collins COBUILD Advanced Learner’s Dictionary.

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

   www.thefreedictionary.com › treacherous

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   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.

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

   www.oxfordlearnersdictionaries.com › definition › english

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   dangerous, especially when seeming safe. The ice on the roads made driving conditions treacherous. Definition of treacherous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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.yourdictionary.com › treacherousTreacherous Definition & Meaning | YourDictionary

   www.yourdictionary.com › treacherous

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   Giving a false appearance of safety or reliability; untrustworthy or insecure. Treacherous rocks. Webster's New World. Characterized by unforeseen or hidden hazards; dangerous or deceptive. Treacherous waters; treacherous footing. American Heritage. Similar definitions. Deceitful; inclined to betray. Wiktionary. Synonyms: unreliable. punic.