The word “enormous” is pronounced as /ɪˈnɔːrməs/ in the International Phonetic Alphabet (IPA). Here’s a simplified guide to help with the pronunciation:
ee-NOR-muhs
The stress is on the second syllable, indicated by the capital letters “NOR.” The “e” in the first syllable is pronounced as “ee,” and the “o” in the second syllable is pronounced as “uh.”