DISABUSE
disabuse
(verb) free somebody (from an erroneous belief)
Source: WordNet® 3.1
Etymology
Verb
disabuse (third-person singular simple present disabuses, present participle disabusing, simple past and past participle disabused)
(transitive) To free (someone) of a misconception or misapprehension; to unveil a falsehood held by (somebody).
Synonyms
• undeceive
Anagrams
• subideas
Source: Wiktionary
Dis`a*buse", v. t. [imp. & p. p. Disabused; p. pr. & vb. n.
Disabusing.] Etym: [Pref. dis- + abuse; cf. F. désabuser.]
Definition: To set free from mistakes; to undeceive; to disengage from
fallacy or deception; to set right.
To undeceive and disabuse the people. South.
If men are now sufficiently enlightened to disabuse themselves or
artifice, hypocrisy, and superstition, they will consider this event
as an era in their history. J. Adams.
Source: Webster’s Unabridged Dictionary 1913 Edition