The spelling of the word "bachelder" may seem a bit tricky at first glance, but it makes perfect sense with the help of IPA phonetic transcription. The word is pronounced as /ˈbætʃəldər/ with emphasis on the first syllable "bach". The "ch" sound is represented as /tʃ/ and the "a" is pronounced as /æ/. The ending "-elder" is pronounced as /əldər/. Armed with this knowledge, it is easy to see why the word is spelled as it is.