sanguine (adj) - confidently cheerful and optimistic, sometimes to an unrealistic extent; hopeful; ruddy or reddish in color [sang-gwin]
BREAKDOWN: SANG- (blood) + -INE (quality)
sanguineous means of, containing, pertaining to, or having the color of blood
sanguinary means of, pertaining to, or inclined to bloodshed; bloody and violent
“But a sanguine temper, though for ever expecting more good than occurs, does not always pay for its hopes by any proportionate depression. it soon flies over the present failure, and begins to hope again.” —Jane Austen