'individually' originates from Latin, specifically the word 'individuus,' where 'in-' meant 'not' and 'dividuus' meant 'divisible.'

'individuus' transformed into the Medieval Latin word 'individualis,' and eventually became the modern English word 'individual' through Middle English.

Initially, it meant 'not divisible,' but over time it evolved into its current meaning of 'separately or one at a time.'