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"
4
deceitful
intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice"_ S.T.Coleridge; "a fraudulent scheme to escape paying taxes"
3
unfriendly
not friendly; "an unfriendly act of aggression"; "an inimical critic"
