To free someone from a mistaken belief or false impression; to correct someone's misconceptions by providing accurate information.
From French 'désabuser,' from 'dés-' (removal) and 'abuser' (to deceive). The word literally means to remove the deception or false belief that someone has been carrying.
Disabuse is like removing 'abuse' of the truth - when someone has been 'abused' by false information, you disabuse them by setting the record straight. You're freeing them from the 'abuse' of misinformation.
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