'post-traumatic' originates from the prefix 'post-' meaning 'after' and the word 'traumatic' derived from the Greek word 'trauma' meaning 'wound'.

'trauma' transformed from the Greek word 'τραῦμα' (trauma) and eventually became the modern English word 'trauma'.

Initially, it meant 'a physical wound', but over time it evolved into its current meaning of 'psychological or emotional injury'.