pahanilkinen, ilkikurinen
ilkeämielinen
haitallinen
ilkikurinen, pahankurinen, pahanilkinen, ilkeä
Causing mischief; injurious.
(quote-book)
Troublesome, cheeky, badly behaved, impish, naughty, disobedient; showing a fondness for causing trouble in a playful way and liking to fun by playing harmless tricks on people or doing things they are not supposed to do.
(ux)