Main Entry:

treach·er·ous

Pronunciation:

\ˈtre-chə-rəs, ˈtrech-rəs\

Function:

adjective

Date:

14th century

1: characterized by or manifesting treachery : perfidious2 a: likely to betray trust : unreliable <a treacherous memory> b: providing insecure footing or support <treacherous quicksand> c: marked by hidden dangers, hazards, or perils

synonyms see faithless

— treach·er·ous·ly adverb

— treach·er·ous·ness noun