misdeed
Misdeed (noun) means a wrong or bad act, which could be anything from a small fault to a serious crime.
Etymology
Comes from Middle English misdede, from Old English misdǣd (“misdeed”), from Proto-West Germanic *missadādi, from Proto-Germanic *missadēdiz (“misdeed”); equivalent to mis- + deed. It is cognate with Scots misded (“misdeed”), West Frisian misdied (“misdeed”), Dutch misdaad (“misdeed”), German Missetat (“misdeed”), Swedish missdåd (“misdeed”), and Gothic ????????? (missadēþs, “misdeed”).