The quality or state of being curst (cursed); damnation, wickedness, or the condition of being under a curse (archaic).
From 'curst' (cursed) plus the noun-forming suffix '-ness,' which converts an adjective into a noun describing an abstract quality.
In medieval literature, characters often complained about the 'curstness' of their fate—it's a poetic way of saying 'why is everything going wrong?'
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