いたずら

Also written イタズラ, 悪戯

Meanings

Noun, する verb, Transitive, Intransitive mischief; prank; trick; practical joke
な-adjective mischievous; naughty
Noun, する verb, Transitive pastime; hobby
playing with (e.g. a lighter); fooling around with; messing around with; amusing oneself with; tampering with
Noun, する verb, Intransitive lewd behaviour; sexual misconduct; sexual assault; molestation; rape

スペンサーはいたずらをした友達に仕返しをするひそかな計画を誰にも言わないだろう。
Spenser would not tell anyone his surreptitious plan to get back at his friends for pranking him.
引き出しの鍵がいたずらされて、書類が一部紛失した。
The lock on my drawer had been tampered with and some of my papers were missing.
一人になるとその子はいたずらを始めた。
The little boy got into mischief when he was left alone.
また僕をかつごうとしているのかい、このいたずら小僧め。
Are you going to play tricks on me again, you naughty boy?
マイクは弟にひどいいたずらをした。
Mike played a bad trick on his brother.

And 5 more.