sanguine SANG-gwin, adjective, noun;
Also used as a noun, red iron-oxide crayon used in making drawings:
1. cheerfully optimistic, hopeful, or confident
2. reddish; ruddy
3. (in old physiology) having blood as the predominating humor and consequently being ruddy-faced, cheerful, etc.
4. blood-red; red
5. Heraldry. a reddish-purple tincture.
adjective:
1. a red iron-oxide crayon used in making drawings