ignave
From LSJ
τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
Latin > English (Lewis & Short)
ignāvē: adv., v. ignavus.
Latin > French (Gaffiot 2016)
ignāvē,¹⁴ avec faiblesse, sans énergie : Cic. Tusc. 2, 55 || [en parl. du style] : Hor. Ep. 2, 1, 67.