euōs

εὖ,
Epic dialect also ἐΰ Refs 8th c.BC+ adverb (properly neuter of ἐΰς):—well, opposed to κακῶς (as in Refs 8th c.BC+
I of knowledge or action, well, thoroughly, competently, εὖ μέν τις δόρυ θηξάσθω, εὖ δ᾽ ἀσπίδα θέσθω Refs 8th c.BC+; τόξων ἐῢ εἰδώς cunning with the bow, Refs 8th c.BC+; εὖ οἶδ᾽ ὅτι parenthetic in colloquial speech, σὺ γὰρ εὖ οἶδ᾽ ὅτι οὐ πράγματ᾽ ᾄσει Refs 5th c.BC+; εὖ οἶδα, in answers, Dioxipp.4; εὖ μήδεο consider well, Refs 8th c.BC+; εὖ λέγεις well spoken ! Refs 5th c.BC+
I.2 morally well, kindly, εὖ ἔρδειν, ={εὐεργετεῖν}, Refs 8th c.BC+; εὖ εἰπεῖν τινα to speak well of him, Refs 8th c.BC+
I.3 with passive or intransitive Verbs, fortunately, happily, in good case, εὖ ζώουσι Refs 8th c.BC+; εὖ οἴκαδ᾽ ἱκέσθαι safely, Refs 8th c.BC+; εὖ φρονῶν in one's right mind, Refs 4th c.BC+, to be well-disposed towards, Refs 5th c.BC+; standing last for emphasis, ἄνδρες γεγονότες εὖ Refs 5th c.BC+: separated from its Verb, εὖ πρᾶγμα συντεθέν Refs 4th c.BC+
II coupled with other Adverbs, especially when qualifying nouns, adjectives, and adverbs, εὖ μάλα Refs 8th c.BC+; εὖ.. πάνυ or πάνυ εὖ, Refs 5th c.BC+; εὖ κἀνδρικῶς, εὖ κἀνδρείως, Refs 5th c.BC+; καλῶστεκαὶ εὖRefs 5th c.BC+
III as substantive, τὸ εὖ the right, the good cause, τὸ δ᾽ εὖ νικάτω Refs 5th c.BC+: in Art, perfection, the ideal, τὸ εὖ διὰ πολλῶν ἀριθμῶν γίνεται Refs 5th c.BC+
IV as the Predicate of a proposition, τί τῶνδ᾽ ε; Refs 4th c.BC+; εὖ εἴη may it be well, Refs; εὐορκεῦντι μέμ μοι εὖ εἶμεν or εἴη, Refs 3rd c.BC+; εὖ σοι γένοιτο well be with thee, Refs 5th c.BC+
V Interjection, well done! to cheer on dogs, εὖ κύνες Refs 5th c.BC+; ahoy! ho! Refs; compare εὖγε.
VI in Compds., implying abundance (εὐανδρία), prosperity (εὐδαίμων, opposed to κακοδαίμων), ease (εὔβατος, opposed to δύσβατος): compounded only with Nouns and adjectives (hence εὖ πάσχω, εὖ ποιέω are better written divisim, but εὐποιητικός implies εὐποιέω: see at {ἀντευποιέω}); εὐδοκέω is exceptional. (Replaced by καλῶς in later Gr., except in set phrases.)

H. G. Liddell, R. Scott, H. S. Jones, A Greek-English Lexicon (9th ed., 1925–1940) — digitised by the Perseus Digital Library and corrected and expanded by Tyndale House, Cambridge, via STEPBible-Data's TFLSJ table, CC BY 4.0. Covers all of Greek literature, not just the Bible.