perfidious,treacheres/faithless
perfidy,treachery/breaking of faith
perfunctory,done as a duty withour care
perilous,dangerous
peripatetic,wandering
perish,be destroyed/decay
perjury,wilful fasle statement/unlawful act
permeate,spread into every part of
pernicious,harmful/injurious
perpetrate,be guilty/commit (a crime)
persevere,keep on steadily/continue
personable,pleasing in appearance/attractive 
perspicacity,quick judging and understanding
pertain,belong as a part/have reference
pest,destructive thing or a person who is nuisance
petrified,taken away power (to think/feel/act)
petrify,to make hard/rocklike 
petrous,like a rock/hard/stony 
petulant,unreasonably impatient 
philistine,a smug ignorant person/one who lacks knowledge 
phlegmatic,calm, sluggish temperament/unemotional 
picaresque,involving clever rogues or adventurers
pied,of mixed colors
pinch,be too tight/take between the thumb and finger
pious,dutifull to parents/devoted to religion
piquant,agreeably pungent/stimulating 
pique,hirt the pride or self-respect/stir (curiosity)
pitfall,covered hole as a trap/unsuspected danger
pith,essential part/force/soft liquid substance
pivotal,of great importance (others depend on it)
placate,soothe/pacify/calm
placate,to pacify/to conciliate
plaintive,mournful/melancholy/sorrowful 
plaque,flat metal on a wall as a memorial
platitude,a trite or banal statement/unoriginality 
plea,request
plead,address a court of law as an advocate
plethora,glut
pliant,pliable/easile bent/shaped or twisted
plod,continue doing smth without resting
pluck,pull the feathers off/pick (flowers)
plumb,get to the root of
plummet,fall, plunge/steeply
plunge,move quickly/suddenly and with force
poignant,deeply moving/keen
poise,be ready/be balanced/self-possession
polemical,controversial/argued 
ponderous,heavy/bulky/dull
portent,omen/mervellous/threatening
poseur,someone taking on airs to impress others/a phony