adjective
1.
Synonyms: harmful , bad, damaging, deleterious, detrimental, evil, hurtful, ill, injurious, nocuous
Related Word: dangerous, hazardous, perilous, precarious, risky
2.
Synonyms: naughty 1, bad, ill-behaved, misbehaving, paw
Related Word: annoying, bothering, bothersome, irking, irksome, vexatious, vexing
3.
Synonyms: playful 1, antic, frolicsome, impish, larkish, ||mischiefful, roguish, sportive, waggish, wicked
Related Word: artful, foxy, insidious, sly, tricky