(A.) REAL COMPOUNDS.
391. Real Compounds are direct compounds of a verb with a preposition;
the root vowel or diphthong of the verb is often weakened (102): as,
#per-agere#, _put through_, _accomplish_; #ab-igere#, _drive away_;
#ex-quīrere#, _seek out_. The prefix, which was originally a separate
adverb modifying the verb, is in poetry sometimes separated from the
verb by another word; the disyllabic prepositions in particular often
remain as juxtaposed adverbs (396).
392. Some prepositions are inseparable, that is, used only in
composition: #ambi-#, _round_, #an-#, _up_, #dis-#, _in two_, _apart_,
#por-#, _towards_, #red-#, #re-#, _back_, #sēd-#, #sē-#, _by oneself_,
_away_: as, #amb-īre#, _go round to_; #an-hēlāre#, _breathe up_;
#dis-pellere#, _drive apart_; #por-rigere#, _stretch forth_; #red-dere#,
_give back_; #sē-iungere#, _separate_.
(B.) APPARENT COMPOUNDS.