τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
mendōsē: adv., v. mendosus.
mendōsē¹⁴ (mendosus), d’une manière défectueuse : Cic. Q. 3, 5, 6 ; Pers. 5, 85