affabre
From LSJ
ἃ γὰρ δεῖ μαθόντας ποιεῖν, ταῦτα ποιοῦντες μανθάνομεν → what we have to learn to do we learn by doing
Latin > English (Lewis & Short)
affā̆brē: adv., v. affaber, I.
Latin > German (Georges)
affabrē, Adv. (affaber) = εντέχνως, kunstgemäß, kunstgerecht (Ggstz. infabre), factus, Cic. I. Verr. 14; vgl. Gell. 7, 7, 5. Prisc. 15, 11.