veteratorie
From LSJ
ὁ γὰρ μανθάνων κιθαρίζειν κιθαρίζων μανθάνει κιθαρίζειν → he who is learning the harp, learns the harp by harping
Latin > English (Lewis & Short)
vĕtĕrātōrĭē: adv., v. veteratorius.
Latin > French (Gaffiot 2016)
vĕtĕrātōrĭē (veteratorius), habilement : Cic. Or. 99.