[f. UNDECEIVE v.] One who or that which undeceives.
1643. (title) The Vn-Deceiver.
1668. R. LEstrange, Vis. Quev. (1708), 114. Some call me the Plain-Dealer; others, the Undeceiver General.
1825. Lytton, Falkland, 20. My manhood has been the undeceiver of my youth.