STEP Greek Lexicon: ἀποκαταλλάσσω

ἀπο-κατ-αλλάσσω

(cf. καταλλάσσω: ἀπό here signifies completely, see Lft., Col., l.with; Ellic., Eph., l.with; but also Mey., Eph., l.with),

to reconcile completely: Eph.2:16, Col.1:20-21.†

(AS)