The spelling of the phrase "study at trust" can be explained using the International Phonetic Alphabet (IPA). The /st/ cluster at the beginning of the word is pronounced with a voiceless alveolar stop followed by a voiceless alveolar fricative, and the /u/ vowel sound is pronounced as a close back rounded vowel. The final consonant cluster is /st/ again, followed by a /i/ sound that is pronounced as a close front unrounded vowel. Overall, the word is spelled phonetically to reflect its pronunciation.