1.primitive a．原始的(original)；簡單的(very simple, not complicated)

詞根記憶：prim(第一)+itive ——最早的——原始的

例：Communications and transports of seventeenth century are too primitive to make comparisons with modern ones.

2.primordial a．原始的(first created or developed)；主要的(fundamental, primary)

詞根記憶：prim(第一)+ord(順序)+ial——處于第一順序的——主要的

例：primordial matter原生物質

3.princely a．高貴的(noble);威嚴的(magnificent)

詞根記憶：來自prince(n.王子)

例：The princely gentleman was polite, charming, and well liked.

4.principal a．主要的(main, chief)；n．校長(headmaster)

例：In birds, the second finger is the principal strut of the wing, which consists primarily of feathers.//a school principal學校校長

派生詞：principally( ad.主要地)

5.principle n.原則(a rule or code of conduct);原理(a comprehensive and fundamental law, doctrine, or assumption)；道義(a moral rule or a strong belief that influences your actions)

詞根記憶：prin（第一）+cip(取)+le——須第一位選取的——原則

例：It discusses an exception to a general principle outIined in the first paragraph．

派生詞：principIed（a．有原則的，有操守的）

同根詞：principaI（a．最重要的）

6.priority n.在先(be more important)；優先權(right to have or do sth．before others)；優先考慮的事(thing that is regarded as more important than Others)

詞根記憶：來自prlor（a．在前的）

例：Airlines are assigning a higher priority to safe seating than to minimizing fuel costs.

7.pristine a．原始的(belonging to the earliest period or state)；未被破壞的(not spoiled，corrupted)；純潔的(pure)；新鮮的(fresh and clean)

詞根記憶：prist（=prim最早的）+ine——原始的

例：There are fewer salmon in degraded regions than in pristine ones．

8.privilege n．特權：優惠(a right granted as a peculiar favor)

例：Women in this community enjoyed unusual legal and economic privileges.

9.privy n．有利害關系的人(a person having a legal interest of privity)；a．私人的(private, withdrawn)；不公開的．秘密參與的(secret)

例：A watchdog group recently uncovered a trick that enables an interloper to rig an E-mail message so that this person will be privy to any comments that a recipient might add as the message is forwarded to others or sent back and forth.

派生詞：privily( ad.秘密地：暗中地)