pen (e)- [GK] = almost 几乎，近似 

peninsula n. 半岛 [insula = island] 

penumbra n. 半影；阴暗交界处[umbra= shadow] 

peneplain n. 近似平原，准平原

pent(a)- [GK] = five 五

pentagon n. 五角形 [-gon = a plane figure with . . . angles] 

pentagram n. (巫术中用作护身符的）五角星形 [-graw =sth. drawn]

pentathlon n. (田径比赛）五项运动 [athlon = contest] 

pentode n. [无]五极管 [-ode=electrode]

petr(o)- [GK] = rock 岩石；petroleum 石油

petroleum n. 石油 [ole = oil]

petrograph n. 刻在岩石上的图文[-graph = sth. drawn] 

petrology n. 岩石学 [-logy = the science of] 

petrochemistry n. 石油化学

pharmac(o)- [GK] = drug 药

pharmacodynamics n. 药效学 [dynam = work] 

pharmacology n. 药理学，药物学 [-logy =the science of] 

pharmacopoeia n. 药典 [poe = to make]

phil(o)- [GK] = loving 爱好

philanthropist n. 慈善家 [anthrop = man] 

philharmonic a. 爱好音乐的（harmonic a. 和声的） 

philosopher n. 哲学家；思想家[soph = wise] 

philotechnical a. 爱好工艺的 [techn = art and skill]

phon (o) - [ GK ] = sound 声音

phonautograph n. [物]声波振动记录[auto- = self; -graph = sth. recorded]

phonogram n. 音标文字 [-gram = sth. that records] 

phonology n. 音位学；音韵学[-logy=the science of] 

phonochemistry n. [化]声化学 

phonofilm n. 有声电影

photo- [GK] = light 光；photograph (y) 照相(术) 

photograph n. 照片 [-graph = sth. recorded] 

photometer n. 光度计 [-meter = a measuring device] 

photoconductor n. [物]光电导体（conductor n. 导体） 

photochrome n. 彩色照相[chrom = colour] 

photocompose n. [印]照相排版 photojournalism n. 摄影新闻工作，摄影报道