τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
subsultim: adv. subsilio,I with leaps or jumps. decurrere, Suet. Aug. 83.
subsultim¹⁶ (subsilio), en sautillant : Suet. Aug. 83.