👉 Diphthongism is a linguistic phenomenon that occurs when two or more words are combined to produce a new word. In other words, it's a process of combining two or more different sounds into one sound that contains all the original sounds but with a slight change in pronunciation.
For example, "bird" and "ive" can be considered as a diphthongism because they consist of the same consonant sound but have the vowels altered. The word "bird" is pronounced as
diphyesis