| | penitent:a. feeling or expressing deep regret for misdeeds
 | percolate:v. spread gradually; cause liquid to pass through small holes; filter
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| percussion:a. striking one object against another sharply
 | perdition:n. entire ruin; utter destruction, especially, utter loss of soul, or of final happiness in future
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| peregrination:n. travel or journey, especially by foot, notably by pilgrim
 | peremptory:a. offensively self-assured; dictatorial; not allowing contradiction or refusal
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| perennially:ad. continually; without ceasing; year after year
 | perfidious:a. tending to betray; disloyal; faithless
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| perforate:v. pierce, punch, or bore hole or holes in; penetrate
 | permaculture:n. system of sustainable agriculture that renews natural resources and enriches local ecosystems
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| permeable:a. penetrable; porous; allowing liquids or gas to pass through
 | permeate:v. spread or flow throughout; pervade
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| perquisite:n. any gain above stipulated salary; extra payment
 | perspicacious:a. having keen insight; mentally perceptive; astute
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| pert:a. improperly forward or bold; trim and stylish in appearance
 | pertinacious:a. stubbornly or perversely persistent; unyielding; obstinate
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| perturb:v. disturb greatly; make uneasy or anxious; throw into great confusion
 | pervade:v. to be present throughout, to pass through
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| pervasive:a. pervading; spread throughout every part
 | pessimism:n. belief that life is basically bad or evil; gloominess
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