'aftertan' originates from the combination of 'after' and 'tan', where 'after' indicates a subsequent time and 'tan' refers to the skin color change due to sun exposure.

'aftertan' is a modern English word formed by combining 'after' and 'tan', reflecting the concept of a tan that remains after sun exposure.

Initially, it meant 'the tan that remains after sun exposure', and this meaning has largely remained the same in modern usage.