I.to stir up, rouse against one, Hom.; ἐπορμῆσαι τοὺς λύκους to set them on, Hdt.; ναύτας ἐφορμήσαντα τὸ πλεῖν having urged them on to sail, Soph.
II.intr. to rush upon, attack, τινί Eur.
III.Pass. and Mid. to be stirred up; c. inf. to be eager or desire to do, Hom.:—absol. to rush furiously on, ἔγχει ἐφορμᾶσθαι Il.; ἐφορμηθείς id=Il.; and, without hostile sense, to spring forward, Od.:— c. acc. to rush upon, make a dash at, Il.