affabre
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
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.
Latin > English
affabre ADV :: skillfully, ingeniously, artistically