vindicate

Short definition from Wiktionary

Verb

1. 1
   To clear of an accusation, suspicion or criticism.
2. 2
   To justify by providing evidence.
3. 3
   To maintain or defend (a cause) against opposition.
4. 4
   To be proven reasonable, correct, or justified.
5. 5
   To provide justification for.
6. 6
   To lay claim to; to assert a right to; to claim.
7. 7
   To liberate; to set free; to deliver.
8. 8
   To avenge; to punish.