v. a.
1.
Repurchase, buy back, regain, retrieve.
2.
Ransom, free, liberate, save, rescue.
3.
Deliver, recover, rescue, save.
4.
Compensate, recompense, make amends for, atone for.
5.
Fulfil, keep, discharge, make good, perform.
6.
Improve, employ well.