The spelling of the word "wart air" can be explained using the International Phonetic Alphabet (IPA) transcription. "Wart" is pronounced as /wɔːt/, with the "w" sound followed by the "or" sound, and the "t" pronounced at the end. "Air" is pronounced as /ɛər/, with the "a" sound followed by a schwa sound and then the "r" sound at the end. Together, "wert air" is pronounced as /wɔːt ɛər/. It is important to know IPA transcription to understand the correct pronunciation of words.