τηλέμαχος

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

Source
Click links below for lookup in third sources:
Full diacritics: τηλέμᾰχος Medium diacritics: τηλέμαχος Low diacritics: τηλέμαχος Capitals: ΤΗΛΕΜΑΧΟΣ
Transliteration A: tēlémachos Transliteration B: tēlemachos Transliteration C: tilemachos Beta Code: thle/maxos

English (LSJ)

τηλέμαχον,
A fighting from afar, Ἄρτεμις Luc.Lex.12.
II in Hom. pr. n., Τηλέμαχος, ὁ, son of Odysseus: Arc. Τηλίμαχος (influenced by the opposite ἀγχίμαχος, as conversely ἀγχέμαχος by τηλέμαχος) IG5(2).1.53 (Tegea, iv B.C.).

French (Bailly abrégé)

ος, ον :
qui combat de loin, càd avec des armes de jet.
Étymologie: τῆλε, μάχομαι.

Mantoulidis Etymological

(=ὁ γιός τοῦ Ὀδυσσέα). Ἀπό τό τῆλε + μάχομαι, ὅπου δές γιά περισσότερα παράγωγα, καθώς καί στή λέξη τῆλε.