sacrilegious

1400–50; late Middle English sacrilegiose; see sacrilege, -ous

The almost universal pronunciation of sacrilegious as [sak-ruh-lij-uh s] /ˌsæk rəˈlɪdʒ əs/ is the result of folk etymology—modifying the pronunciation of an unfamiliar word so that it conforms to a more familiar one—in this case religious. Etymologically, sacrilegious has no direct relationship to religious. The historical pronunciation [sak-ruh-lee-juh s] /ˌsæk rəˈli dʒəs/ occurs in American English, though not in British English, and criticism of the newer pronunciation has almost disappeared.