1.prodigy n．奇跡(an extraordinary, marvelous, or unusual accomplishment, deed, or event);奇才(a highly talented child or youth)；奇觀(sth. extraordinary or inexplicable)
例：A child prodigy, Clara Schumann developed into one of the greatest pianists of her time.
同根詞：prodigious(a.驚人的;異常的；奇妙的)

2.professional a．專業的(characterized by or conforming to the technical or ethical standards of a profession)；職業的(of, relating to, or characteristic of a profession)；n．專業人員(one that is professional)
詞根記憶：來自profession(n.職業；專業)
例：Women began to study history as professional historians.
派生詞：professionally( ad.專業地：內行地)
同根詞：professor(n．教授)

3.proficient a．熟練的，精通的（skillful）
詞根記憶：pro(在前)+fic(做的)+ient--做在別人前面--熟練的
例：The linguist was proficient in five languages.
同根詞：sufficient(a．足夠的)；deficient(a.缺乏的)

4.profile n.剖面(a side or sectional elevation)；輪廓(outline);分布圖(a set of data often in graphic form portraying the significant features of something)
詞根記憶：pro(前面)+file（=fili線條）--前部的線條--輪廓
例：pollen profile花粉剖面//high profile高姿態//temperature profile溫度曲線圖

5.profitability n．贏利能力，收益性（ability to afford profits）
詞根記憶：來自profit(n．利潤，利益：v.獲利，有益)
例：One study showed, for example, that acquiring firms were on average unable to maintain acquired firms' pre-merger levels of profitability.
同根詞：profitable(a．有利可圖的；有益的)

6.profitable a．有利可圖的（offering profits）
詞根記憶：來自profit(n．利益，利潤；v．獲利)
例：Winter wheat and spring wheat are usually about equally profitable.
派生詞：profitably( ad.有利地，有益地)
同根詞：nonprofit(a．非贏利的)

7.profound a．深刻的，意義深遠的(far-reaching)
詞根記憶：pro+found(底部)--探究到底部--深奧的
例：The fecundity effects may have the most profound impact on these plant species.
派生詞：profundity(n．深度，深刻)

8.prognosis n.預后（對疾病的發作及結果的預言）(the prospect of recovery as anticipated from the usual course of disease)
詞根記憶：pro(提前)+gnosis(知道)——先知道——預后
例：A prognosis is made and evidence supporting it is discussed.