absolve implies a setting free from responsibilities or obligation absolved from her promise or from the penalties for their violation; acquit means to clear of a specific charge by a judicial decision, usually for lack of evidence; to exonerate is to relieve of all blame for a wrongdoing; to pardon is to release from punishment for an offense the prisoner was pardoned by the governor; forgive implies giving up all claim that an offense be punished as well as any resentment or vengeful feelings; to vindicate is to clear (a person or thing under attack) through evidence of the unfairness of the charge, criticism, etc.
To free from a charge or imputation of guilt:clear, exculpate, exonerate, vindicate. (Law) acquit, purge. See law
To free from an obligation or duty:discharge, dispense, excuse, exempt, let off, relieve, spare. See free