The Arabic-Ethiopic Glossary by al-Malik al-Afḍal by Maria Bulakh and Leonid Kogan is a detailed annotated edition of a unique monument of Late Medieval Arabic lexicography, comprising 475 Arabic lexemes (some of them post-classical Yemeni dialectisms) translated into several Ethiopian idioms and put down in Arabic letters in a late-fourteenth century manuscript from a codex in a private Yemeni collection. For the many languages involved, the Glossary provides the earliest written records, by several centuries pre-dating the most ancient attestations known so far. The edition, preceded by a comprehensive linguistic introduction, gives a full account of the comparative material from all known Ethiopian Semitic languages. A detailed index ensures the reader’s orientation in the lexical treasures revealed from the Glossary.