"mischievous" in the adjective sense
1. arch, impish, implike, mischievous, pixilated, prankish, puckish, wicked
naughtily or annoyingly playful
"teasing and worrying with impish laughter"
"a wicked prank"
2. mischievous
deliberately causing harm or damage
"mischievous rumors and falsehoods"
Source: WordNet® (An amazing lexical database of English)
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