mischief: [13] Etymologically, mischief is something that ‘happens amiss’. The word comes from Old French meschef, a derivative of the verb meschever ‘meet with misfortune’. This was a compound verb formed from the prefix mis- ‘wrongly, amiss’ and chever ‘happen’ (which came ultimately from Latin caput ‘head’, and etymologically meant ‘come to a head’). It still meant ‘misfortune’ when English acquired it; in the 14th century the sense ‘harm, damage’ emerged, but the more trivial modern sense ‘naughtiness’ did not develop until the 18th century.
