Found 2 items, similar to treacherous.
English → English (WordNet) Definition: treacherous treacherous adj 1: dangerously unstable and unpredictable; “treacherous winding roads”; “an unreliable trestle” [syn: unreliable] 2: tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans; “Punic faith”; “the perfidious Judas”; “the fiercest and most treacherous of foes”; “treacherous intrigues” [syn: punic, perfidious]
English → English (gcide) Definition: Treacherous Treacherous \Treach"er*ous\, a. [See Treacher.] Like a traitor; involving treachery; violating allegiance or faith pledged; traitorous to the state or sovereign; perfidious in private life; betraying a trust; faithless. [1913 Webster] Loyal father of a treacherous son. --Shak. [1913 Webster] The treacherous smile, a mask for secret hate. --Cowper. [1913 Webster] Syn: Faithless; perfidious; traitorous; false; insidious; plotting. [1913 Webster] -- Treach"er*ous*ly, adv. -- Treach"er*ous*ness, n. [1913 Webster]