Abbott-Smith Manual Greek Lexicon
εὔ-χρηστος (G2173)
3 εὔ-χρηστος , -ον ( εὖ, χράομαι ), [in LXX: Pr 31:13 ( חֵפֶץ ), Wi 13:13 * ;] useful, serviceable : c. dat. pers., II Ti 2:21 ; id. seq. εἰς , c. dat. rei, II Ti 4:11 ; opp. to ἄχρηστος , Phm 11 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain