κοίλη

From LSJ

Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil

Plato, Laws, 626e

Greek (Liddell-Scott)

κοίλη: ἡ, θηλ. τοῦ κοῖλος: ὄνομα δήμου τῆς Ἀττικῆς, Φίλωνα τὸν ἐκ τῆς Κοίλης Ἰσοκρ. 375D, κτλ.

Russian (Dvoretsky)

κοίλη:1) (sc. ναῦς) кузов или трюм корабля Theocr.;
2) лощина или русло (ποταμοὶ ῥέοντες διὰ κοίλης Arst.).