1. (情绪突然)颓丧的，抑郁的，沮丧的
    If you have a sinking feeling, you suddenly become depressed or lose hope.

    e.g. I began to have a sinking feeling that I was not going to get rid of her.
           我开始有一种永远也摆脱不了她的沮丧情绪。

1. a slow fall or decline (as for lack of strength)

    e.g. after several hours of sinking an unexpected rally rescued the market
           he could not control the sinking of his legs

2. a descent as through liquid (especially through water)

    e.g. they still talk about the sinking of the Titanic

3. a feeling caused by uneasiness or apprehension

    e.g. with a sinking heart
           a sinking feeling in the pit of my stomach

    Synonym: sinking feeling