Webster’s Revised Unabridged Dictionary · 1913
Exculpate
Ex·cul′pate (·pāt), v. t. [imp. & p. p. Exculpated, p. pr. & vb. n.. Exculpating.] [L. ex out + culpatus, p. p. of culpare to find fault with, to blame, culpa fault. See Culpable.] To clear from alleged fault or guilt; to prove to be guiltless; to relieve of blame; to acquit.
He exculpated himself from being the author of the heroic epistle. Mason.
I exculpate him further for his writing against me. Milman.
Syn. — To exonerate; absolve; clear; acquit; excuse; vindicate; justify.