Wello Oromo is one of the least described dialects of the Oromo language. Thernthesis describes the palatalization process of alveo-dental consonants in respect with Baatern(officially "Baati" ) variety ofWello Oromo.rnData were collected in two ways; by interviewing and by recording stories,rnconversations, etc.. The data are described in the framework of auto segmental phonologyrn(see chapter 1.0).rnA descriptive overview of roots, stems and affixes that are relevant in the discussionrnof the palatalization process is also given (see chapter 2.0). The process which changesrnroot-final semi-vowel I followed by nasal consonant g to !!!! is described in terms ofrnrecursive assimilatory process (see chapter 3.0). In previous work on Ororno, it is usuallyrnassumed that consonant! begins the causative morpheme of Oromo. And this! is thoughtrnto condition the palatalization of a preceding alveo-dental obstruent or lateral !. In thisrnthesis, evidence is presented that the causative morpheme in Oromo begins with i and notrnwith! at underlying representation (see chapter 4.0). This assumption, could, therefore,rnwell account for the palatalization of the alveo-dental obstruents and lateral! (see chapterrn5.0).rnIn general it is established that consonants, !! , ! , !!, 1, l' and ! are palatalized in thernenvironment of an underlying high front vowel ior palatal semivowel I that mayor may notrndirectly appear on the surface. This is also in agreement with universal assumptions aboutrnpalatalization processes across languages. Also other related issues to the palatalizationrnprocess are addressed in every chapter of the thesis.rnIt is hoped that the study adds to our knowledge of Oromo and may also providernfurther material and analysis towards comparative study of Ororno dialectology which isrncurrently not well understood.