masseur

The word 'masseur' is a direct borrowing from French, where it serves as the masculine agent noun for one who performs massage. Its core morpheme, 'mass', traces back through French and Portuguese to the Latin 'massa', meaning a lump or dough, evoking the kneading action central to massage. The suffix '-eur' is the French equivalent of the English '-er', denoting a person who performs a specific action. Thus, the term's literal construction logically describes "a man who performs the action of kneading or handling," which perfectly aligns with the modern professional definition.

Structure: mass (to handle, touch) + eur (agent suffix) 'mass' from French 'masser' (to massage), itself from Portuguese 'amassar' (to knead), ultimately from Latin 'massa' (mass, dough). 'eur' is a French agent noun suffix, from Latin '-ator'.