The state or quality of being forlorn; complete hopelessness, loneliness, or abandonment.
From 'forlorn' + '-ity' (abstract noun suffix). The '-ity' suffix was highly productive in English for creating nouns describing qualities or states, derived from Latin nominalization patterns.
This word is quite rare because English speakers preferred just saying 'forlornness,' but 'forlornity' shows a fascinating pattern—every time a new adjective appeared, speakers would try adding '-ity' to nominalize it, even though most attempts never stuck.
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