The correct spelling for "study at fictitious" is easily identified using IPA phonetic transcription. The key sounds include /stʌdi/ for "study," /æt/ for "at," and /fɪkˈtɪʃəs/ for "fictitious." The tricky part is the correct spelling of "fictitious." It is important to note the presence of the "t" sound in the second syllable, which is often missed by spellers. Remembering this sound and properly using IPA can help ensure that the spelling of this word is accurate.