- impish, implike, mischievous, pixilated, prankish, puckish - naughtily or annoyingly playful; "teasing and worrying with impish laughter"
Antonyms: unplayful, serious, sober (indirect, via playful)
- mischievous, naughty - badly behaved; "he was saucy and mischievous in school"; "a naughty boy"
Antonym: good (indirect, via bad)
- mischievous - deliberately causing harm or damage; "mischievous rumors and falsehoods"
Antonym: harmless (indirect, via harmful)