ἄφιππος
From LSJ
κοινὸν τύχη, γνώμη δὲ τῶν κεκτημένων → good luck is anyone's, judgment belongs only to those who possess it
English (LSJ)
ον,
A unsuited for cavalry, Καρία X.HG3.4.12, cf. Plu.Ant. 47. II of persons, unused to riding, opp. ἱππικός, Aeschin.Socr. Oxy.1608 Fr.1.15; ignorant of horsemanship, Pl.Prt.350a, R.335c, Luc.Nav.30. 2 without cavalry, Polyaen.4.6.6.