Abbott-Smith Manual Greek Lexicon
ἐκ-δίκησις (G1557)
9 † ἐκ-δίκησις , -εως, ἡ ( ἐκδικέω ), [in LXX chiefly for נָקָם ;] vengeance, vindication : Lk 21:22 , Ro 12:19 (v. MM, Exp. , xii), He 10:30 (LXX) , II Co 7:11 ; of the injured person, c. gen., Lk 18:7 , 8 ; c. dat., Ac 7:24 ; of the offender, c. gen. obj., I Pe 2:14 ; c. dat., II Th 1:8 (cf. Si 12:6 ).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain