The spelling of the word "art tardy" may seem confusing, but it can be explained using IPA phonetic transcription. The first syllable "art" is pronounced with the vowel sound /ɑː/ and the consonant sound /r/. The second syllable "tardy" is pronounced with the vowel sound /ɑː/ and the consonant sounds /t/ and /d/. Therefore, the correct spelling reflects the pronunciation of the word. It is important to use correct spelling and pronunciation to effectively communicate in written and spoken language.