Revindicate

verb (used with object), vindicated, vindicating.
1.
to clear, as from an accusation, imputation, suspicion, or the like:
to vindicate someone’s honor.
2.
to afford justification for; justify:
Subsequent events vindicated his policy.
3.
to uphold or justify by argument or evidence:
to vindicate a claim.
4.
to assert, maintain, or defend (a right, cause, etc.) against opposition.
5.
to claim for oneself or another.
6.
Roman and Civil Law. to regain possession, under claim of title of property through legal procedure, or to assert one’s right to possession.
7.
to get revenge for; avenge.
8.
Obsolete. to deliver from; liberate.
9.
Obsolete. to punish.
verb (transitive)
1.
to clear from guilt, accusation, blame, etc, as by evidence or argument
2.
to provide justification for: his promotion vindicated his unconventional attitude
3.
to uphold, maintain, or defend (a cause, etc): to vindicate a claim
4.
(Roman law) to bring an action to regain possession of (property) under claim of legal title
5.
(rare) to claim, as for oneself or another
6.
(obsolete) to take revenge on or for; punish
7.
(obsolete) to set free