Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
ιππεύοντασ riding LXX.Ezek.23.23
ιππευόντων ones riding LXX.Mic.1.13
ίππευσεν Αχαάβ Ahab rode horseback LXX.1Kgs.18.45
ίππευσε rode LXX.2Kgs.9.16

Liddell-Scott-Jones

ἱππεύω (hippeuō) to ride horseback G:V

ἱππεύω-εύω,

to be a horseman or rider, ride, [Refs 5th c.BC+]; of a people, ἱππεύωεύει ταῦτα τὰ ἔθνη [Refs 5th c.BC+]:—also in middle, [Refs]

__2 metaphorically, of the wind, ζεφύρου πνοαῖς ἱππεύωεύσαντος [ἱππεύωεύουσα δι᾽ ὀρφναίας [prev. author] “Supp.” 994 (Lyric poetry)">Refs 5th c.BC+]; also, rush, πρὸς φόνον [Refs]
__II serve in the cavalry, [Refs 5th c.BC+]
__II.2 at Rome, to be an eques, [Refs 2nd c.AD+]; τὸ -εῦον the ordo equester, [Refs]
__III of a horse, as we say 'the horse rides (i.e. carries his rider) well', [Refs 5th c.BC+]
__IV drive a team, [Refs 5th c.BC+]