misdo (v.)

Old English misdon, "to do evil or wrong, transgress, err" (senses now obsolete), common Germanic compound (compare Old Frisian misdua, Middle Dutch misdoen, Old High German missituon, German misstun); see mis- (1) + do (v.). Meaning "to do (work, etc.) improperly" is from 1840. Related: Misdoer; misdone; misdoing.