"nastiness" in the noun sense
1. filth, filthiness, foulness, nastiness
a state characterized by foul or disgusting dirt and refuse
2. cattiness, bitchiness, spite, spitefulness, nastiness
malevolence by virtue of being malicious or spiteful or nasty
3. nastiness
the quality of being highly unpleasant
"I flinched at the nastiness of his wound"
Source: WordNet® (An amazing lexical database of English)
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