'deporter' ultimately comes from Latin, specifically the verb 'deportare,' where 'de-' meant 'away' and 'portare' meant 'to carry.'

'deportare' passed into Old French as 'deporter' and into Middle English as 'deporten'/'deport,' with the English agent suffix '-er' forming 'deporter' for someone who carries out deportation.

Originally it meant 'to carry away' (literally), and over time it narrowed to mean 'to expel (especially from a country)' and the agent 'deporter' came to mean the person who effects that expulsion.