sanguine

American  

[sang-gwin] / ˈsæŋ gwɪn /

adjective

1. cheerfully optimistic, sometimes to the point of seeming complacent, oblivious, or naive.

   a sanguine disposition;

   sanguine expectations.

   Synonyms:

   positive, optimistic, hopeful, confident, cheerful, buoyant, assured

   Antonyms:

   morose

2. reddish; ruddy.

   a sanguine complexion.

3. (in old physiology) having blood as the predominating humor and consequently being ruddy-faced, cheerful, etc.

4. bloody; sanguinary.

5. blood-red; red.

6. Heraldry. a reddish-purple tincture.

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noun

1. a red iron-oxide crayon used in making drawings.

sanguine British  

/ ˈsæŋɡwɪn /

adjective

1. cheerful and confident; optimistic

2. (esp of the complexion) ruddy in appearance

3. blood-red

4. an obsolete word for sanguinary

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noun

1. Also called: red chalk.  a red pencil containing ferric oxide, used in drawing

Other Word Forms

• nonsanguine
  adjective
• nonsanguinely
  adverb
• nonsanguineness
  noun
• oversanguine
  adjective
• oversanguinely
  adverb
• oversanguineness
  noun
• presanguine
  adjective
• quasi-sanguine
  adjective
• quasi-sanguinely
  adverb
• sanguinely
  adverb
• sanguineness
  noun
• sanguinity
  noun
• sanguinness
  noun
• supersanguine
  adjective
• supersanguinity
  noun
• unsanguine
  adjective
• unsanguinely
  adverb

Etymology

Origin of sanguine

First recorded in 1275–1325; Middle English sanguyne “a blood-red cloth,” from Old French sanguin, from Latin sanguineus “bloody,” equivalent to sanguin-, stem of sanguis “blood” + -eus -eous

Explanation

If you're sanguine about a situation, that means you're optimistic that everything's going to work out fine. Sanguine is from Latin sanguis, "blood," and it originally meant "bloody" — in medieval medicine, it described someone whose ruddy complexion was a sign of an optimistic outlook. That was back when people thought that "bodily humors" like blood were responsible for people's attitudes. Now that we no longer believe in humors, sanguine has settled down as a fancy way to say someone is cheerfully confident that things will work out well.

Example Sentences

The 23-year-old is sanguine about that day at Headingley, rightly pointing out he was targeted in a game England were never going to win after they were bowled out for 131.

From BBC • Apr. 30, 2026

The U.S. stock market has been relatively sanguine about the fallout from these shortages, but economists caution it could take a bit of time until the full ramifications are seen in the economy.

From Barron's • Apr. 23, 2026

He was sanguine about the effects of OTC, even though it was temporary, and expensive, and even though the treated trees got reinfected every four months.

From Slate • Apr. 20, 2026

Those of a contrarian bent may thus consider a very high ratio is signaling equity investors are too sanguine, while a dive in the ratio may mean they are too pessimistic.

From MarketWatch • Mar. 23, 2026

Adams, usually the more apocalyptic member of the team, in this instance adopted the more sanguine Jeffersonian posture.

From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis

Related Words

• buoyant
• cheerful
• confident
• enthusiastic
• hopeful
• upbeat