Silmarillion is a proper noun, the title of J.R.R. Tolkien’s mythopoeic collection detailing the history of the fictional universe. It is pronounced with a three-syllable cadence, emphasizing the second syllable, and begins with a soft, light sibilant before unfolding into a melodic, Tolkien-inspired sequence that ends with an approximate “ee-on” or “ee-uh-lion” sound depending on speaker origin.
Full pronunciation guide