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
Sycurium: i, n.,
I a town of Thessaly, Liv. 42, 54; 42, 56 sq. al.
Sycurĭum, ĭī, n. (Συκύριον), ville de Thessalie, au pied du mont Ossa : Liv. 42, 54.