Preverbs are originally independent words of adpositional/adverbial origin (Adposition and Adpositional Phrase) that in the course of the history of Greek coalesced with verbs to form compound verbs, such as eis-érkhomai ‘go in, enter’ from eis ‘in’ and érkhomai ‘go’. The ability to function as a preverb is often taken as an indication of primary preposi…