ὁρμή
Alt. ὁρμη, ἡ,
I. "a violent movement onwards, an assault, attack, onset", Lat. impetus, Il., Hdt., Xen.
2. of things, πυρὸς ὁρμή "the rage" of fire, Il.; ὑπὸ κύματος ὁρμῆς by "the shock" of a wave, Od.; ἐς ὁρμὴν ἔγχεος ἐλθεῖν within "reach" of my spear, Il.
II. "the first stir or start in" a thing, "an effort or attempt" to reach a thing, "impulse" to do it, Hom., Hdt., attic:— μιᾷ ὁρμῇ with one "impulse", Lat. uno impetu, Xen.; so, ἀπὸ μιᾶς ὁρμῆς Thuc.:—c. gen. objecti, "eager desire of or for" a thing, id=Thuc.
2. "a start" on a "march", ἐν ὁρμῇ εἶναι to be on "the point of starting", Xen.