英汉词典

1. 不幸福的；不快乐的；愁苦的
    If you are unhappy, you are sad and depressed.

unhappy的解释

    e.g. Her marriage is in trouble and she is desperately unhappy...
           她的婚姻陷入困境，她为此非常郁闷。
    e.g. He was a shy, sometimes unhappy man...
           他是一个腼腆的人，有时候还很忧郁。