Downhearted means sad and disappointed, especially after you tried for something and it did not work. The feeling sits in the chest: hope has dropped. A team can look downhearted after a loss; a student can feel downhearted after a test they studied hard for. It is heavier than a passing “I’m sad,” but kinder and less sharp than angry. People often use it to comfort: “Don’t be downhearted.” It sounds a little older and more careful than everyday “upset,” so you meet it in stories, speeches, and news about people who tried and failed, though actually some families still say it at the dinner table. You can be downhearted for an evening and then be fine; it is not the same as a long illness of the mind.

灰心、沮喪（努力過卻沒成）