Pene- (L.), almost, as peninsula.
Per- (L.), through, as permit; thoroughly, as perfect; also appearing as par-, pel-, pil-, as in parson, pardon, pellucid, pilgrim. In perjure, perish, it has a destructive force, equivalent to Eng. for- in forswear (for-, A.S.). [Akin to Gr. para-, beside, Eng. for-, Ger. ver.]
Peri- (Gr.), round, as perimeter, periphrasis. [Gr. peri; Sans. pari, also allied to Gr. para.]
Pol-, Por- (L.), as pollute, portend. [From Old L. port-, towards; cf. Ger. pros, Eng. forth.]
Poly- (Gr.), many, as polygamy.
Por-, as in portrait. See Pro- (2).
Post- (L.), after, backwards, behind, as postdate, postscript, postpone.
Pour-, Pur- (Fr.—L.), as pourtray, purvey. [Fr.—L. pro-.]
Pre-, Præ- (L.), before, as predict, prefer, prearrange, prætor; also in prison and provost. [L. præ, akin to L. pro.]
Preter- (L.), beyond, as preterit, preternatural, pretermit. [L. præter—præ, with comp. suffix -ter.]