τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
adformido adformidare, adformidavi, adformidatus V INTRANS :: be afraid, fear
adformīdō,¹⁶ āre, intr., être pris de peur : Pl. Bacch. 1078.