The spelling of the word "GREMIUM" follows the rules of Latin phonetics. The first syllable "GRE" sounds like /grɛ/, with a short "e" sound. The second syllable "MI" is pronounced as /mi/, with a short "i". The final syllable "UM" is pronounced as /ʌm/, with a schwa sound and a nasal consonant. Therefore, the correct pronunciation of "GREMIUM" is /ˈɡrɛmiʌm/. This word is not commonly used in modern English, but can refer to a metallic element in the periodic table with the symbol "Gm".