n 1 [U] being sad 悲哀; 忧伤. 2 [C usu pl 通常作复数] thing that makes one sad 令人悲哀或忧伤的事物 *One of the many sadnesses in his life was that he never had children. 他一生中的一大憾事就是膝下犹虚.
sadness
朗文当代英英词典(第4版)
n [U] the state of feeling sad = unhappiness great/deep sadness She sensed Beth's deep sadness. It was with great sadness that we learned of his death. There was a touch of sadness in his voice (=he sounded a little sad) . His relief was tinged with sadness (=he also felt rather sad) .