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έχθριος

Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη -> The first and best victory is to conquer self.
Plato, Laws 626e

Greek Monolingual

ἔχθριος (Μ) εχθρός
εχθρικός («ἔχθριος ὀργή», Πλαν.).