In historical linguistics, phonological change is any sound change that alters the distribution of phonemes in a language. In other words, a language develops a new system of oppositions among its phonemes. Old contrasts may disappear, new ones may emerge, or they may simply be rearranged.

How English has changed in terms of phonology?

English, however, has experienced great phonological change over the centuries, for example, it has lost consonantal length, has acquired phonemic voiced fricatives, and has developed contrastive word stress under Romance influence.

What are the types of phonological changes?

phonological changes, namely assimilation, metathesis, epenthesis, epithesis, and deletion. They are presented in Table 1.