The spelling of the word "cladi" can be explained using IPA phonetic transcription. The first syllable, "cla", is pronounced as /klæ/. The second syllable, "di", is pronounced as /diː/. When the two sounds are combined, the spelling becomes "cladi". The word "cladi" is not commonly used in English, but it can be found in some technical language as a noun referring to certain structures of plants or algae.