The correct spelling of the phrase, "study at knowledge" is actually "study of knowledge." The correct pronunciation of the word "study" is /ˈstʌdi/ and the correct pronunciation of the word "of" is /ʌv/. The phrase means to learn and acquire knowledge through studying. It is important to use accurate spelling and pronunciation when communicating to ensure clarity and understanding. So, if you want to study knowledge, remember to use "study of knowledge" instead of "study at knowledge."