Amarakosha (Skt. Amarakośa; Tib. འཆི་མེད་མཛོད་, Wyl. chi med mdzod; Eng. Immortal Treasure) — a thesaurus of Sanskrit written by the ancient Indian scholar Amarasingha (Skt. Amarasiṃha). It is the oldest extant work of its kind and there have been numerous commentaries. It has found its way into the Tibetan Tengyur (Toh 4299) and is the source of a famous verse listing all the epithets of Buddha Shakyamuni.