This adjective that means "behaving disobediently or mischievously" comes from the Old English for "nothing"
[DOC] [TLE] Confusing Words Clarified: Group A; Homonyms, Homophones ... [PAR] English can be very confusing; for example, a house burns up as it burns down, a 
form is ... just one or two letters in a word can change its meaning completely.