悪戯

From 徒 (itazura, “useless, vain”).[1]

The kanji are jukujikun (熟字訓), from 悪 (“evil, bad”) + 戯 (“frolic”).

• (Tokyo) いたずら [ìtázúrá] (Heiban – [0])[1]
• IPA^(key): [ita̠zɨᵝɾa̠]

悪戯(いたずら) • (itazura) ^{←いたづら (itadura)?}

1. tease, prank, trick, practical joke, mischief
   • 1906, Natsume Sōseki, Botchan‎:

     この外(ほか)いたずらは大(だい)分(ぶ)やった。

     Konohoka itazura wa daibu yatta.

     Besides the above, I did many other mischiefs.

2. playing with (a lighter, for example), tampering with, fooling around with, messing around with
3. hobby, pastime
4. action that is a considered a misconduct (Can we verify⁽⁺⁾ this sense?)
5. sexual assault, molestation, rape

• This term is often spelled in hiragana.

From the on'yomi reading of the ateji spelling.

• (Tokyo) あ​くぎ [áꜜkùgì] (Atamadaka – [1])[1]
• IPA^(key): [a̠kɯ̟ᵝɡʲi]

悪(あく)戯(ぎ) • (akugi) 

1. Same as いたずら (itazura) above.