c. 1300, "causing misfortune or trouble (to oneself or others)," from un- (1) "not" + happy. Meaning "unfortunate, unlucky" is recorded from late 14c.; sense of "miserable, wretched" is recorded from late 14c. (originally via misfortune or mishap).
权威例句
1. The affixes " un - " and " - less " are often used make negative words, such as unhappy or careless.
词缀un - 和 -less 常用来构成否定词, 如unhappy和careless.
2. I don't want him to feel forsaken and unhappy.
我不想让他感到被抛弃而不快乐。
3. The boy was unhappy because he thought he was friendless.
这个男孩自认为没有朋友,所以闷闷不乐。
4. He has been unhappy with his son's political leanings.
他一向不满意儿子的政治倾向。
5. Washington is unhappy with the peace plan which it views as unworkable.