subside /səbˈsaid/ vi. （洪水）退落；（土地、建筑物）下沉；平息：The floods subside almost as quickly as they arise. 洪水涨得快退得也快。I'll wait a few minutes until the storm subsides.我会等几分钟直到暴风雨减弱。The island is subsiding.小岛在下沉。It took seven days for the swelling to subside completely.花了七天的时间才完全消肿。