The spelling of the word "fooi" is determined by the International Phonetic Alphabet (IPA) as /fuːi/. The IPA symbols represent the sounds that make up this word. The first sound, /f/, is a voiceless labiodental fricative, followed by a long /uː/ sound, which is a close back rounded vowel. Finally, the word ends with the sound /i/, which is a close front unrounded vowel. Combined, these sounds create the unique pronunciation of "fooi".