From lutron; to ransom (literally or figuratively) -- redeem.
see GREEK lutron
1. to release on receipt of ransom: Plato, Theact., p. 165 e.; Diodorus 19, 73; the Sept., Numbers 18:15, 17.
2. to redeem, liberate by payment of ransom ((Demosthenes, others)), generally expressed by the middle; universally, to liberate: τινα ἀργυρίῳ, and likewise ἐκ with the genitive of the thing; passive ἐκ τῆς ματαίας ἀναστροφῆς, 1 Peter 1:18; middle "to cause to be released to oneself (cf. Winers Grammar, 254 (238)) by payment of the ransom, i. e. to redeem; universally, to deliver": in the Jewish theocratic sense, τόν Ἰσραήλ, viz. from evils of every kind, external and internal, Luke 24:21; ἀπό πάσης ἀνομίας, Titus 2:14 (cf. Winer's Grammar, § 30, 6 a.); τινα ἐκ, spoken of God, Deuteronomy 13:5; 2 Samuel 7:23; Hosea 13:14.