The word 'VAI' is a four-letter word, and it is spelled using the alphabet 'V' and 'A' followed by the alphabet 'I.' The phonetic transcription of the word 'VAI' is represented using the International Phonetic Alphabet (IPA), which is ['vaɪ]. The vowel sound of 'VAI' is pronounced as an open mid-front unrounded vowel ['a'], followed by a diphthongal sound that is pronounced as ['ɪ], which forms a sound like 'eye.' Overall, the spelling of the word 'VAI' is simple and easy to understand.