The spelling of the word "OSAI" is straightforward once you understand its phonetic makeup. The word consists of two syllables, with stress falling on the first syllable - "oh-SAI." The "oh" sound is represented by the letter "o" and the "sai" sound starts with the "s" consonant followed by a long "a" vowel sound and ends with the "i" vowel sound. The phonetic transcription for this word is /oʊˈsaɪ/.