1.permeate v.擴(kuò)散(to spread or diffuse through)；滲透(to penetrate)

詞根記憶：per(全部)+mea(通過)+te--全通過--滲透

例：Neutrinos(微中子)are another form of radiation that permeates the universe.

2.permissive a．許可的（granting or inclined to grant permission；tolerant or lenient）；過分縱容的(indulgent)

詞根記憶：來自permit(v.許可，允許)

例：permissive terms許可條款

派生詞：permissively( ad.許可地；自由地)

同根詞：submissive(a.順從的)

3.permit v.允許，許可(to allow);n.通行證，許可證(a written warrant or license granted by one having authority)

詞根記憶：per(全部)+mit(送，放出)--全部放出--通行證

例：Personality development is hindered if a person is not permitted to be independent.

派生詞：permission(n．許可，允許)

4.pernicious a．有害的(highly injurious)；致命的(deadly)

詞根記憶：per(全部)+nic(毒)+ious--有毒的--有害的：致命的

例：The sustained massive use of pesticides in farming has two side effects that are especially pernicious.

5.perpendicular a．垂直的(vertical, exactly upright);n.垂線(a line at right angles to a line or plane)

詞根記憶：per(自始至終)+pend(掛)+icular--自始至終掛著--垂直的

例：A ladder 25 feet long is leaning against a wall that is perpendicular to level ground.

6.perpetrator n.作惡者(a person who does sth. considered outrageous);犯罪者(criminal)

詞根記憶：來自perpetrate(y．犯罪)

例：The perpetrators are in effect told that they are not responsible for their actions.

同根詞：petrify(v.石化，僵化)

7.perpetuate v.延長(zhǎng)…的存在，使永記不忘(to cause to last indefinitely)

詞根記憶：per(自始至終)+pet(追求)+uate--永遠(yuǎn)追求--永記不忘

例：The myth is perpetuated by the compensation consulting industry.

8.perplex v.使（某人）困惑(to puzzle)；（使）復(fù)雜化(to make intricate)

詞根記憶：per(全部)+plex(重疊)--全部重疊在一起--困惑

例：The difficult math problem perplexed the students.

派生詞：perplexed(a.困惑的)

9.persecute v.迫害(to oppress cruelly)

詞根記憶：per(始終)+secu(跟隨)+te--從頭到尾跟隨--迫害

例：The two parties disprove the theory of the other, but unite in persecuting the dissenters.