PhD (Tshivenda) / Senthara ya M.E.R. Mathivha ya Nyambo dza Afrika kha Vhutsila na Mvelele / Tshivenḓa is one of African languages spoken in the Northern parts of South Africa and some parts of Zimbabwe. This proposal focuses on a study of selected phonological processes involving Tshivenḓa vowels. The Tshivenḓa phonological processes involving vowels under this study include vowel elision/deletion, vowel epenthesis, vowel coalescence, vowel nasalisation, vowel harmony, vowel raising and glide formation. In this regard, consonants are not part and parcel of this study. Furthermore, the study enriches the phonology of Tshivenḓa with more phonological processes thereby adding on the existing literature. The study also attempts to motivate and encourage Tshivenḓa speaking people and those who are interested in the language to have a clear understanding of phonological processes which occur in Tshivenḓa. The theoretical framework underpinning this study is the Optimality Theory (OT). The study will be carried out through phonological analysis, that is, field work and word list. Secondary sources will also be used for data collection.