misstep (v.)

also mis-step, c. 1300, missteppen, "make a false step, stumble," from mis- (1) "badly, wrongly" + step (v.). Figurative sense by c. 1500. The noun in the figurative sense of "faux pas" is recorded by c. 1800; the literal sense "a false step, a stumble" is by 1837.

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Definitions of misstep from WordNet

misstep (n.)
an unintentional but embarrassing blunder;
confusion caused his unfortunate misstep
Synonyms: trip / trip-up / stumble