Search Result for "undeceive": 
Wordnet 3.0

VERB (1)

1. free from deception or illusion;

The Collaborative International Dictionary of English v.0.48:

Undeceive \Un`de*ceive"\, v. t. [1st pref. un- + deceive.] To cause to be no longer deceived; to free from deception, fraud, fallacy, or mistake. --South. [1913 Webster]
WordNet (r) 3.0 (2006):

undeceive v 1: free from deception or illusion [ant: betray, deceive, lead astray]