The quality or state of being cussed; stubborn or irritating behavior; spitefulness.
From cussed plus the abstract noun suffix -ness, which transforms adjectives into nouns describing their qualities. Colloquial rather than formal English.
When someone exhibits 'cussedness,' they're being ornery—it's that Irish quality of stubborn defiance that seems almost joyful in its refusal to cooperate or comply!
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