perdurus
From LSJ
τῶν γὰρ μετρίων πρῶτα μὲν εἰπεῖν τοὔνομα νικᾷ → the first mention of the word moderation wins the game (Euripides, Medea 125f.)
Latin > English (Lewis & Short)
per-dūrus: a, um, adj.,
I very hard (post-class.): interpretatio, Dig. 48, 3, 2.
Latin > French (Gaffiot 2016)
perdūrus, a, um, très dur, très rigoureux : Papin. Dig. 48, 3, 2.