infragilis
From LSJ
τὸν αὐτὸν ἔρανον ἀποδοῦναι → pay him back in his own coin, repay him in his own coin, pay someone back in their own coin, pay back in someone's own coin, give tit for tat, pay back in kind
Latin > English (Lewis & Short)
in-frăgĭlis: e, adj.,
I that cannot be broken to pieces.
I Lit.: adamas, Plin. H. N. 20 prooem. § 2.—
II Trop., strong, that cannot be weakened: vox, Ov. Tr. 1, 5, 53: animi, Sen. Vit. B. 9.
Latin > French (Gaffiot 2016)
īnfrăgĭlis,¹⁶ e, qui ne peut être brisé : Plin. 20, pr. 2 || [fig.] ferme, inébranlable : Ov. Tr. 1, 5, 53 ; Sen. Vita b. 9, 4.