/ ˈsæŋgwɪn; NAmE / adjective
sanguine (about sth) ( formal ) cheerful and confident about the future
SYN optimistic :
They are less sanguine about the company's long-term prospects.
He tends to take a sanguine view of the problems involved.
► san·guine·ly adverb
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WORD ORIGIN
Middle English : from Old French sanguin(e) blood red, from Latin sanguineus of blood, from sanguis , sanguin- blood.