Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
mischief [ˈmɪstʃɪf] n (naughtiness, playfulness) озорство́; (maliciousness) зло
to get into mischief прока́зничать (напрока́зничать perf)
to do sb a mischief причиня́ть (причини́ть perf) кому́-н зло
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: