ex-marine

The term is a modern English compound, formed by directly combining the Latin prefix 'ex-' with the noun 'marine'. The prefix 'ex-', deriving from Latin ex meaning "out of, from," is widely used in English to denote a former status or condition, as seen in words like 'ex-president' or 'ex-wife'. The word 'marine' entered English via Middle French from the Latin marinus ("of the sea"), itself from mare ("sea"). The specific military sense of 'marine' for a soldier of a naval infantry developed in the 17th century. Therefore, 'ex-marine' logically constructs its meaning as "one who is out of or formerly a member of the marine corps," precisely indicating a person's past affiliation.

Structure: ex (former) + marine (marine soldier) - ex: A prefix of Latin origin meaning "out of, from, former." - marine: A word of Latin origin (from marinus, "of the sea") referring to a soldier serving on a ship or in a naval infantry force.