The word "Mesnum" is spelled with two syllables: /mɛz.nʌm/. The first syllable is pronounced with an open-mid front unrounded vowel /ɛ/, similar to "bed" or "let". The second syllable begins with a voiced alveolar fricative /z/ and ends with an open-mid back unrounded vowel /ʌ/, making the sound similar to "buzz" or "hut". The spelling of Mesnum does not follow conventional English spelling rules, as it is most likely a made-up word or a proper noun with unconventional spelling.