cynic
cyn.ic \'sin-ik\ n [MF or L, MF cynique, fr. L cynicus, fr. Gk kynikos, lit., li]ke a dog, fr. kyn-, kyo-n dog cap 1: an adherent or advocate of the view that virtue is the only good and tha t its essence lies in self-control and independence 2: one who believes that human conduct is motivated wholly by self-interest - cynic aj