The uncommon word "bolen" is spelled with the IPA (International Phonetic Alphabet) symbols /bəʊlən/. The first sound, /b/, is a voiced bilabial stop, followed by the diphthong /əʊ/, which represents the sounds of "oh" and "let" pronounced together. The last sound, /lən/, is made up of a syllabic /l/ followed by a schwa sound /ən/. The spelling of "bolen" may appear confusing to some readers, but the IPA transcription helps to clarify its sound structure.