ψίλαξ
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
English (LSJ)
(A) [ῑ], ακος, ὁ,
A = ψιλός, Ar.Fr.891.
ψίλαξ (B), ακος, ὁ, epith. of Dionysus at Amyclae, Paus.3.19.6; he explains it as
A winged (from ψίλον Dor. for πτίλον), which suggests that it has ῐ.
Greek (Liddell-Scott)
ψίλαξ: [ῐ], -ᾰκος, ὁ, = ψιλός, Ἀριστοφ. Ἀποσπ. 705· «ψίλαξ ποιηταί, ὡς Ἀριστοφάνης, ψιλὸς δὲ καὶ λεῖος λογογράφοι» Θωμᾶς Μάγιστρ. σ. 928, πρβλ. καὶ Μοῖριν σ. 419.