A diphthong is a sound formed by combining two vowels in a single syllable. The sound begins as one vowel sound and moves towards another. The two most common diphthongs in the English language are the letter combination “oy”/“oi”, as in “boy” or “coin”, and “ow”/ “ou”, as in “cloud” or “cow”.
A diphthong, also known as a gliding vowel, is a combination of two adjacent vowel sounds within the same syllable. Technically, a diphthong is a vowel with two different targets: that is, the tongue moves during the pronunciation of the vowel.
So come on! explore this curse.