English Dictionary
Definition treacherous in British English
treacherous adjective
adjective
/ˈtretʃərəs/
1
someone who is treacherous pretends that they support you but secretly tries to harm you, for example by helping an enemy
Synonyms and related words
2
very dangerous, especially because the dangers are not obvious
Example
Is it wise to go out in this treacherous weather?
Synonyms and related words
