unhappiness
n. 苦恼；忧愁
例句
She was trapped in a downward spiral of personal unhappiness.
她陷入了个人不幸的旋涡难以自拔。
《牛津词典》
Failure will lead to unhappiness in life.
失败会导致生活中的不幸。
That's a condemnation of the students as a whole, and doesn't explain all campus unhappiness.
这是对学生整体的谴责，并不能解释所有校园的不快。
