Sound Created by Two Vowels in One Syllable
Puzzle 8 of Hawaii Pack
Question is: Sound Created by Two Vowels in One Syllable
and the answer is: DIPHTHONG
Word Meaning:
DIPHTHONG — (phonology) A complex vowel sound that begins with the sound of one vowel and ends with the sound of another vowel, in the same syllable.
Definitions from Wiktionary.