ἔνρυθμος
From LSJ
τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
English (LSJ)
ον,
A of rhythm, αἴσθησις Pl.Lg.654a; possessing rhythm (opp. εὔρυθμος), D.H.Comp.11; διάλεκτος Ephor.6 J.; opp. ἔκρυθμος, S.E.M.11.186. Adv. -μως Ath.5.179f, 14.631b (prob.).