| 单 dān |
| red ; medicine |
| 丹心 dān xīn |
| 丹剂 dān jì | |
Its original meaning was “cinnabar” extracted from a mine. So , in oracle bone and bronze inscriptions a dot was added in the mine shaped structure, Its extended meaning are “red” (not as deep a red as 赤, chi) and “medicine refined from minerals.” |