What is adieu; farewell; good-by; -- chiefly used among Spanish- speaking people. This word is often pronounced å*de"os, but the Spanish accent, though weak, is on the final syllable called?

adios — Adieu; farewell; good-by; -- chiefly used among Spanish- speaking people. This word is often pronounced å*de"os, but the Spanish accent, though weak, is on the final syllable. (Webster's 1913.)