九还丹 jiǔhuándān elixir of immortality Origin Definitions Defs Strokes Stroke Words Sentences Sents 九 jiǔ numeral nine the number nine还 還 huán verbnoun to go back to go or come back; to return to a place or restore to a former state丹 dān pellet a pill, powder, or small pellet of Chinese medicine; also refers to the elixir of life in Taoist alchemy