Non-Semitic features are visible in every aspect of the grammar and lexicon of Ethio-Semitic languages. Because Amharic has been serving as a language of administration for over a millennium, it has developed unique polite forms for second and third persons. These polite forms underwent a number of fascinating changes throughout history. This book describes the historical grammar of Amharic which furthers our understanding of the changes that Ethio-Semitic languages underwent. The research is based on ancient manuscripts and grammatical works of different periods.