American Dictionary

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Definition treacherous in American English

treacherous adjective

adjective
/ˈtretʃərəs/
1

very dangerous, especially because the dangers are not obvious

Example

Is it wise to go out in this treacherous weather?

Example

a treacherous road/path/journey

Synonyms and related words
2

someone who is treacherous pretends that they support you but secretly tries to harm you, for example by helping an enemy

Example

treacherous behavior/thoughts

Synonyms and related words
Definition treacherous in American English