好词典
ebb
UK /eb/US /eb/
词源
源自古英语 'ebba'（退潮），与古诺尔斯语 'efja'（回水）同源，最终可能源自原始日耳曼语词根表示'后退'。
noun
❶ 指海水退潮时的水位下降过程，也可比喻事物逐渐减弱或衰退的状态。
“The tide was at its ebb, leaving wet sand exposed.”
（潮水正在退去，露出了湿润的沙滩。）
“His strength was at a low ebb after the long illness.”
（久病之后，他的体力处于低谷。）
同义词:recession, decline, diminution
verb
❶ 指潮水退去，或比喻某种力量、情绪等逐渐减弱或消失。
“The floodwaters finally began to ebb after three days.”
（三天后洪水终于开始退去。）
“Her enthusiasm for the project ebbed as difficulties arose.”
（随着困难出现，她对项目的热情逐渐消退。）
同义词:recede, wane, subside
常见短语
at a low ebb — 形容处于最低点或最弱状态，常用于描述情绪、健康或形势。
“After the business failure, his confidence was at a low ebb.”
（生意失败后，他的自信心跌至谷底。）
ebb and flow — 原指潮汐涨落，现多比喻事物的起伏变化或周期性波动。
“The ebb and flow of fashion trends is fascinating to observe.”
（观察时尚潮流的起伏变化十分有趣。）