Portuguese n.

country on the west side of the Iberian peninsula, late 14c., Portyngale, from Medieval Latin Portus Cale (the Roman name of modern Oporto), "the port of Gaya," from Latin portus "harbor, port" (see port (n.1), also port (n.5)). Alfonso, Count of Portucale, became the first king of Portugal.

word-forming element, from Old French -eis (Modern French -ois, -ais), from Vulgar Latin, from Latin -ensem, -ensis "belonging to" or "originating in."

late 14c., "a soldier;" see man (n.) + war (n.). Meaning "armed ship, vessel equipped for warfare" is from late 15c. Man in the sense of "a ship" is attested from late 15c. in combinations (such as merchantman). The sea creature known as the Portuguese man-of-war (1707) is so called for its sail-like crest. The great U.S. thoroughbred race horse was Man o' War (1917-1947).