mis·do \(ˈ)mis|dü, -i|stü\verb Etymology: Middle English misdon, from Old English misdōn, from mis- (I) + dōn to do — more at do intransitive verb obsolete: to do wrong < not willfully misdoing, but unware misled — John Milton > transitive verb : to do wrongly or improperly < misdo even a simple assignment >