The spelling of the word "OPMTPN" may seem confusing at first glance, but when broken down phonetically using the International Phonetic Alphabet (IPA), it becomes clearer. The word is pronounced /ɑːpiːɛmˈtiːpiːɛn/. The five vowels in the word are pronounced with the long "a" sound, represented by the symbol /ɑː/. The consonants, including the rare combination of "pmtpn," are all pronounced individually with their respective voiced and unvoiced sounds. Despite its unconventional spelling, "OPMTPN" can easily be pronounced with the help of IPA transcription.