Exculpate implies a clearing from blame or fault often in a matter of small importance. See ‘meaning & use’ for definitions, usage, and quotation evidence. Definition of vindicate verb in oxford advanced learner's dictionary
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To prove that what someone said or did was right or true, after other people thought it was…
To clear, as from an accusation, imputation, suspicion, or the like. See examples of vindicate used in a sentence. To clear, as from an accusation or suspicion To uphold or justify by argument or evidence
To maintain or defend against opposition. Discover everything about the word vindicate in english Vindicate means to justify, prove, or reinforce an idea — or to absolve from guilt If your family thinks you hogged the last piece of pie on thanksgiving, you'll be vindicated when your younger brother fesses up.
There are 12 meanings listed in oed's entry for the verb vindicate, four of which are labelled obsolete