Antonyms of adj mischievous

2 senses of mischievous

Sense 1
arch, impish, implike, mischievous, pixilated, prankish, puckish, wicked -- (naughtily or annoyingly playful; "teasing and worrying with impish laughter"; "a wicked prank")

INDIRECT (VIA playful) -> unplayful, serious, sober -- (completely lacking in playfulness)

Sense 2
mischievous -- (deliberately causing harm or damage; "mischievous rumors and falsehoods")

INDIRECT (VIA harmful) -> harmless -- (not causing or capable of causing harm; "harmless bacteria"; "rendered the bomb harmless")

Similarity of adj mischievous

2 senses of mischievous

Sense 1
arch, impish, implike, mischievous, pixilated, prankish, puckish, wicked -- (naughtily or annoyingly playful; "teasing and worrying with impish laughter"; "a wicked prank")
       => playful (vs. unplayful) -- (full of fun and high spirits; "playful children just let loose from school")

Sense 2
mischievous -- (deliberately causing harm or damage; "mischievous rumors and falsehoods")
       => harmful (vs. harmless) -- (causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking")