Third-person singular simple present indicative form of undeceive.(verb)
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Use "undeceives" in a sentence
"But the old fairy with the birch rod soon undeceives them."
"He returns to London, and meets with Cadwallader, who entertains him with many curious Particulars — Crabtree sounds the Duchess, and undeceives Pickle, who, by an extraordinary Accident, becomes acquainted with another Lady of Quality."
"Duchess, and undeceives Pickle, who, by an extraordinary Accident, becomes acquainted with another Lady of Quality."