'post-tempest' originates from Latin, specifically the prefix 'post-' meaning 'after' and the word 'tempestas' meaning 'storm'.

'tempestas' transformed into the Old French word 'tempeste', and eventually became the modern English word 'tempest'. The prefix 'post-' was added to denote the period following a storm.

Initially, it meant 'after a storm', but over time it evolved into its current meaning of 'a period following any tumultuous event'.