sanguine

Meanings

1. 1
   adj

   optimistic or cheerfully confident, especially in a difficult situation

   Despite the setbacks, she remained sanguine about the project's prospects.

Simplified etymology

Sanguine comes from Latin sanguis, “blood.” Under the medieval doctrine of the four humours, a person in whom blood predominated was believed to have a cheerful, optimistic temperament and a florid complexion, producing the word’s later descriptive senses.

From Old French sanguin, from Latin sanguineus ('of blood'), from sanguis (stem sanguin-) 'blood'; the optimistic sense comes from medieval humoral theory, in which a blood-dominant temperament was cheerful.

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