The spelling of the word "bichlbaum" can be a bit confusing due to the combination of letters used in the word. In IPA phonetic transcription, the word is pronounced as /ˈbɪklbaʊm/. The letter "b" is followed by "i", which makes the "bi" sound. Then "ch" is pronounced as "k", leading to the "kl" sound. Finally, "baum" is pronounced as "bawm". This unique spelling is a challenge for those who are not familiar with the word.