ἱππάσιμος
From LSJ
διὸ καὶ μεταλάττουσι τὴν φυσικὴν χρῆσιν εἰς τὴν παρὰ φύσιν αἱ δοκοῦσαι παρθένοι τῶν εἰδώλων → therefore those professing to be virgins of the idols even change the natural use into the unnatural (Origen, commentary on Romans 1:26)
English (LSJ)
[ᾰ], η, ον,
A fit for horses, fit for riding, Αἴγυπτον τὸ πρὶν ἐοῦσαν ἱππασίμην καὶ ἁμαξευομένην, opp. ἄνιππος, Hdt.2.108, cf. 5.63,9.13, X. Cyr.1.4.14, Aen.Tact.6.6, Plb.10.49.5, Onos.31.1, etc.; τὸ ἱππάσιμον, i.e. τὸ πεδινόν, X.HG7.2.12; τὰ ἱ. τῆς χώρας ἄνιππα ποιεῖν Aen.Tact.8.4: metaph., τοῖς κόλαξιν ἑαυτὸν ἀνεικὼς ἱππάσιμον allowing himself to be ridden by flatterers, Plu.Alex.23.