The spelling of the phrase "study at tired" is straightforward when broken down phonetically. The first word, "study," is spelled as /ˈstʌdi/, with the emphasis on the first syllable. The second word, "at," is spelled as /æt/, with a short "a" sound that rhymes with "cat." Finally, the adjective "tired" is spelled as /ˈtaɪərd/, with the emphasis on the second syllable and a long "i" sound. Despite its clear pronunciation, it's important to get spelling correct so that audiences understand the intended meaning.