definition of
mischievousness

[1] #1 mischievousness n. [naughtiness, badness] an attribute of mischievous children. wn

[2] #2 mischievousness n. [impishness, puckishness, whimsicality] the trait of behaving like an imp. wn

[3] #3 mischievousness n. [mischief, mischief-making, deviltry, devilry, devilment, rascality, roguery, roguishness, shenanigan] reckless or malicious behavior that causes discomfort or annoyance in others. wn