the.com/diphthong
Two vowels caught mid-affair, gliding into each other inside a single syllable.
means A vowel sound that shifts from one position to another within the same syllable, like the vowel in coin or loud.
from From Greek diphthongos, literally two voices or two sounds, joining di (twice) and phthongos (sound).
Hidden everywhereThe word now, oil, and price all contain them.
Pure oppositeSingle steady vowels are called monophthongs.
Triple versionThree gliding vowels make a triphthong, as in fire.