ἐλεοκόπος
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)
ὁ, dub. sens. in Lys.Fr.28. (Expld. either fr. A ἐλεός 1 or as, = οἱ τὰ ἕλη κόπτοντες.)
Spanish (DGE)
-ου, ὁ sent. dud., quizá trinchador, cocinero, o bien el que corta la maleza en los pantanos Lys.Fr.21.2.