Home › Words › U › undeceiverundeceiverundeceiver means one who undeceives.Among words judged in Lexicurio's Arena, undeceiver ranks #28,418 of 42,762 for Qualifying.EtymologyFrom undeceive + -er.nounOne who undeceives.Definitions & examples from Wiktionary (CC BY-SA 3.0).