To reform, change (for the better)
To recover ownership of something by buying it back.
To clear, release from debt or blame
To set free by force.
To save, rescue
To repair, restore
To liberate by payment of a ransom.
To save from a state of sin (and from its consequences).
To restore the honour, worth, or reputation of oneself or something.
To expiate, atone (for)
To convert (some bond or security) into cash
To change radically or significantly, as in a revolution.