Ransom.
In the O.T., except in Exodus 21:30, the word is kopher, lit. 'a covering,' a cognate word to kaphar, often translated 'atonement.' None "can by any means redeem his brother, nor give to God a ransom for him." Psalms 49:7. but God could say, "Deliver him from going down to the pit: I have found a ransom." Job 33:24. The word occurs also in Exodus 30:12; Job 36:18; Proverbs 6:35; Proverbs 13:8; Proverbs 21:18; Isaiah 43:3. In the N.T. it is lutron, or antilutron, from 'to loose, set free.' Christ gave Himself, His life, a ransom for many: the precious blood of Christ witnesses that every claim of God against the believer has been answered. Matthew 20:28; Mark 10:45; 1 Timothy 1:2.