"deviltry" in the noun sense
1. deviltry, devilry
wicked and cruel behavior
2. mischief, mischief-making, mischievousness, deviltry, devilry, devilment, rascality, roguery, roguishness, shenanigan
reckless or malicious behavior that causes discomfort or annoyance in others
Source: WordNet® (An amazing lexical database of English)
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