MISDOUBT

PRONUNCIATION: (mis-DAUT)

MEANING: verb tr.: To doubt or suspect.
verb intr.: To have doubts.
noun: Doubt or suspicion.

ETYMOLOGY: From mis- + doubt, from Old French doter (to doubt or fear), from Latin dubitare (to doubt or hesitate). The doubt element is ultimately from the Indo-European root dwo- (two), which also gave us dual, double, dubious, doubt, diploma, twin, between, and didymous (occurring in pairs). Earliest documented use: 1530s.
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MI-DOUBT - I think the third note of your scale was flat

MIS'D-OUT - you didn't take advantage of that opportunity

AMIS' DOUBT - I hear Kingsley's written a new book, about a spy plagued by uncertainty