Crossword Puzzle diphthongs and triphthongsOnline version diphthongs a diphthong is a speech sound that sound tahta is usually considered as ones distinctive vowels of a particular language. but in fact it involves two pure vowels or monophthongs, with one vowels gliding into the other. triphthongs each of some complex vowels id found to be made up of three monophthongs. the english language has such vowels that are very difficult to recognize and pronounce. by Ivania Baque 1 triphthongs 2 triphthongs 3 triphthongs 4 diphthongs 5 triphthongs 6 triphthongs 7 diphthongs 8 diphthongs 9 triphthongs 10 diphthongs 11 diphthong 12 diphthongs 7 9 11 8 10 2 5 4 3 12