exonerate

Short definition from Wiktionary

Verb

1. 1
   To relieve (someone or something) of a load; to unburden (a load).
2. 2
   Of a body of water: to discharge or empty (itself).
3. 3
   To free (someone) from an obligation, responsibility or task.
4. 4
   To free (someone) from accusation or blame.

Adjective

1. 1
   Freed from an obligation; freed from accusation or blame; acquitted, exonerated.