名词反义词为 happiness,例如:

1、She found happiness in her later years.她在晚年才寻得幸福。

2、He didn't want to cast a shadow on their happiness.他不想给他们的幸福蒙上阴影。

3、A person's wealth is often in inverse proportion to their happiness.一个人的财富常常与他的幸福成反比。