late Old English mistimian "to happen amiss" (of an event); see mis- (1) "badly, wrongly" + time (v.). Meaning "not to time properly, say or do inappropriately" is from late 14c. Related: Mistimed; mistiming.
She mistimed the marathon runner
mist
mistake
mistaken
mister
misthink
mistime
mistletoe
mistral
mistranslate
mistranslation
mistreat