Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993.
aficionado (n.)
(plural: aficionados) is variously pronounced in American English, but the most frequent Standard pronunciation is af-FI-shuh-NAH-do. The word means a devotee of a sport, hobby, or other activity; a fan. Spell it with one f. See PLURALS OF NOUNS ENDING IN -O.