'aloneness' originates from Middle English, specifically the word 'aloon,' where 'all' meant 'entirely' and 'one' meant 'single.'

'aloon' transformed into the modern English word 'alone,' and eventually became 'aloneness' to describe the state of being alone.

Initially, it meant 'entirely one,' but over time it evolved into its current meaning of 'the state of being alone.'