The vowels are frequently separated into two classes: monophthongs and diphthongs. Monophthongs are developed with only one articulatory movement (therefore the prefix mono), even though diphthongs element an articulatory improve. Diphthongs have two constituents: a glide (or perhaps a semivowel) as well as a monophthong. There may be some disagreement https://mario2cxr1.blogdon.net/the-smart-trick-of-korean-that-no-one-is-discussing-44168486