Diftong
Also known as gliding vowel
thumb|American English pronunciation of "no highway cowboys" , showing five diphthongs:
AI overview
A diphthong is a single vowel sound in speech that actually contains two different vowel sounds blended together, like the "ow" sound in "no" or the "oy" sound in "boy." Diphthongs matter because they're a key feature of how languages like English are actually pronounced, and understanding them helps explain why words sound the way they do.
AI-generated from the Wikipedia summary — may contain errors.