n. (Kata=イタズラ, Kanji=悪戯) mischief, naughty behavior that is not spiteful; source of evil or misfortune; harm, damage; trouble maker (usually a child); vexation, annoyance; one who has an annoying disposition

v. (Kanji=悪戯する) tease, pester, taunt, mock

adj. (Kanji=悪戯な) naughty, not disciplined, unruly; mischievous