To Vindicate

1. (transitive) To clear of an accusation, suspicion or criticism.
2. (transitive) To justify by providing evidence.
3. (transitive) To maintain or defend (a cause) against opposition.
4. (transitive) To provide justification for.
5. (transitive) To lay claim to; to assert a right to; to claim.
6. (transitive, obsolete) To liberate; to set free; to deliver.
7. (transitive, obsolete) To avenge; to punish