The spelling of the surname Bergersen can be challenging to grasp without understanding its IPA phonetic transcription. The word is pronounced as "ber-gur-sen" (bɜːʳ.ɡəː.sən), where the 'g' sound is pronounced ambiguously between a hard /g/ (gɜːʳ) and the softer /j/ (jɜːʳ) sound. The letter 'e' between 'g' and 'r' is unpronounced and serves as an indicator of the 'g' sound. The '-sen' ending is pronounced as /sən/, without any ambiguity. By learning the IPA transcription, one can accurately spell and pronounce Bergersen.