Etymology
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sanguineous (adj.)

"pertaining to blood," 1510s, from Latin sanguineus, from sanguin-, stem of sanguis (see sanguinary).

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Definitions of sanguineous

sanguineous (adj.)
accompanied by bloodshed;
Synonyms: gory / sanguinary / slaughterous / butcherly
sanguineous (adj.)
confidently optimistic and cheerful;
Synonyms: sanguine
From wordnet.princeton.edu