Abbott-Smith Manual Greek Lexicon
εὖ (G2095)
6 εὖ adv. (prop. neuter of old Epic ἐΰς , good, noble ) [in LXX, εὖ γίγνεσθαι, εὖ ποιεῖν ( יָטַב ) ;] well : εὖ γιν. , Eph 6:3 (LXX) ; εὖ ποιεῖν , c. dat. (cf. Si 12:1-2 ), to do good , Mk 14:7 (where Nestle suggests εὐποιεῖν , q.v.); εὖ πράσστειν , to fare well , Ac 15:29 ; in replies (= εὖγε ), good! well done! Mt 25:21 , 23 Lk 19:17 ( εὖγε , WH, txt.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain