exeo

Exeo, exire, exii or exivi, exitum is a compound of the irregular eo, and it inherits every quirk: exeo, exis, exit, eximus, exitis, exeunt, imperfect exibam, future exibo. The perfect is usually the short exii rather than exivi. The stage direction exit, "he goes out", is simply this verb's third person singular, and exeunt is the plural of it.

Construction is the usual one for motion away: ex or de plus the ablative for the place left, ad or in plus the accusative for the destination, and a bare ablative for towns and for domo. The extended sense, of a period of time running out (annus exiit), gives us exit and exitus, and the noun exitus also means "outcome" and, euphemistically, "death", which is a shorter road than English takes to the same place.