The spelling of "bonser" can be a bit tricky to decipher when it comes to its pronunciation. The phonetic transcription using the International Phonetic Alphabet (IPA) would show it as /ˈbɒnsər/. The first syllable, "bon", is pronounced like "bon" in "bonfire", while the second syllable, "ser", is pronounced as "sir" with an added "uh" sound at the end. Overall, the correct pronunciation of "bonser" may take some practice, but being familiar with the IPA can certainly make it easier.