Question

It is a special kind of vowel sound. It is a vowel sound formed by a combination of two vowels sounded as one syllable.

Answer 1

Answer:

diphthong

A diphthong (/ˈdɪfθɒŋ/ DIF-thong or /ˈdɪpθɒŋ/ DIP-thong; from Greek: δίφθογγος, diphthongos, literally "double sound" or "double tone"; from δίς "twice" and φθόγγος "sound"), also known as a gliding vowel, is a combination of two adjacent vowel sounds within the same syllable.

Explanation:

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Answer 2

Answer:

o,u hope it's helpful for you