How many syllables are there in "child," "wild," and field"? If we look at the dictionary, it will tell us that these are monosyllabic words. There appear, however, to be diphthongs in each of these that lengthen the vowels to make them sound as though there are two. What do our experts say?
The words are indeed Monosyllabic. The diphthongs only show that both vowels are pronounced as two non-identical letters, but in a gliding sense, so as to not lengthen the actual word. The words continue to hold only one syllable.