pessimism

n.悲观；悲观主义

perturb, perturbation, perturbed, perusal, peruse, pervade, pervasion, pervasive, pervasively, pervasiveness, perverse, perversely, perverseness, perversity, perversion, perversity, pervert, peseta, pesky, peso, pessary, pessimist, pessimistic, pessimistically, pest, pest control, pester, pesticide, pestilence, pestilent, pestle, pet, pet name, pet shop, pet subject, petal, petalled (US petaled), petard, peter, petit bourgeois, petite,