In the word eight, the initial sound isA/e/B/ai/Cei/D/i/Answer: C. ei/ Read Explanation: The word "eight" begins with the diphthong /eɪ/ (often written /ei/ for simplicity in some texts).This diphthong starts with the vowel sound /e/ and glides towards /ɪ/.The whole word is transcribed as /eɪt/ in IPA. Read more in App