'expat' originates from the Latin word 'expatriatus,' where 'ex-' meant 'out of' and 'patria' meant 'native country.'

'expatriatus' transformed into the French word 'expatrié,' and eventually became the modern English word 'expat' through Middle English.

Initially, it meant 'to leave one's native country,' but over time it evolved into its current meaning of 'a person living outside their native country.'