adj 1: dangerously unstable and unpredictable; "treacherous winding roads"; "an unreliable trestle" [syn: treacherous, 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, treacherous]
adjectiveDate: 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:seefaithless • treacherouslyadverb • treacherousnessnoun
adj. 1 guilty of or involving treachery. 2 (of the weather, ice, the memory, etc.) not to be relied on; likely to fail or give way. Derivatives: treacherously adv. treacherousness n. Etymology: ME f. OF trecherous f. trecheor a cheat f. trechier, trichier: see TRICK
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. Loyal father of a treacherous son. --Shak. The treacherous smile, a mask for secret hate. --Cowper. Syn: Faithless; perfidious; traitorous; false; insidious; plotting. -- Treach"er*ous*ly, adv. -- Treach"er*ous*ness, n.
1. If you describe someone as treacherous, you mean that they are likely to betray you and cannot be trusted. He publicly left the party and denounced its treacherous leaders...ADJ [disapproval] 2. 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...ADJ