quieten

1. V-T/V-I If someone or something quietens or if you quieten them, they become less noisy, less active, or silent. 使安静; 安静[英国英语]

The wind dropped and the sea quietened. 风势减弱了，大海平静下来。

2. V-T To quieten fears or complaints means to persuade people that there is no good reason for them. 消除 (恐惧); 平息 (抱怨)[美国英语]

Supporters of the constitution had to quieten fears that aristocrats plotted to steal the fruits of the revolution. 宪法的支持者们不得不消除人们对贵族阴谋窃取革命成果的恐惧。