If you are sanguine, you feel cheerful and expect things to go well. It is a formal, slightly old-fashioned word for hopeful — more at home in essays and news analysis (the minister remains sanguine) than in the playground.

If you are sanguine如果你sanguine you feel cheerful and expect things to go well你會覺得樂觀，覺得事情會順利It is a formal, slightly old-fashioned word for hopeful這是個正式、有點老派的字，意思是抱有希望 more at home in essays and news analysis比較常出現在文章和新聞分析裡 (the minister remains sanguine)（像the minister remains sanguine這位部長仍然樂觀） than in the playground而不是在小孩玩耍的場合

The idea comes from old medical thinking: doctors once said the body had four fluids, or humours, and a person with a lot of blood (Latin sanguis) was thought to be warm, lively, and optimistic. That medical picture is dead; the hopeful meaning is what remains.

The idea comes from old medical thinking這個想法來自古老的醫學觀念 doctors once said the body had four fluids, or humours醫生曾經認為身體裡有四種體液 and a person with a lot of blood (Latin sanguis)而血（拉丁文sanguis）比較多的人 was thought to be warm, lively, and optimistic被認為性情溫暖、活潑又樂觀That medical picture is dead那套醫學說法早就過時了 the hopeful meaning is what remains留下來的是「樂觀」這個意思

There is also an old use for a blood-red colour, but the meaning you will meet in modern writing is the hopeful one. Though actually, sanguine hope can sound a little too sunny, as if the speaker is refusing to see the risk.

There is also an old use for a blood-red colour這個字也有個舊用法是指血紅色 but the meaning you will meet in modern writing is the hopeful one但你在現代文章裡會遇到的是樂觀這個意思sanguine hope不過sanguine式的樂觀 can sound a little too sunny聽起來可能有點過於樂天 as if the speaker is refusing to see the risk好像說話的人不肯正視風險一樣

Very easy to confuse with sanguinary (bloody, violent) — same root, opposite weather.

Very easy to confuse with sanguinary (bloody, violent)很容易跟sanguinary（血腥、暴力）搞混 same root, opposite weather字根一樣，氣氛卻完全相反