'post-mortem' originates from Latin, specifically the phrase 'post mortem,' where 'post' meant 'after' and 'mortem' meant 'death.'

'post mortem' was used in Latin to describe events occurring after death and eventually became the modern English term 'post-mortem.'

Initially, it meant 'after death,' but over time it evolved to include the examination of a body after death and the analysis of events after they occur.