'afterpast' is a compound word formed from 'after' and 'past', where 'after' indicates a subsequent time and 'past' refers to a time that has already occurred.

'Afterpast' is a modern English creation, combining the words 'after' and 'past' to describe a speculative time period.

Initially, it was used in speculative fiction to describe a future influenced by past events, and this meaning has largely remained the same in modern usage.