GRE

pertinacious - stubborn; persistent

pertinent - suitable; to the point :: applicable appropriate relative relevant apposite material

perturb - disturb greatly :: disquiet

pert - impertinent; forward

perusal - reading

pervasive - spread throughout :: prevalent widespread current popular prevailing

perverse - stubbornly wrongheaded; wicked and unacceptable

perversion - corruption; turning from right to wrong

pessimism - belief that life is basically bad or evil; gloominess :: fear defeatism despair no way out

pestilential - causing plague; baneful

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