ebb

退潮、落潮

The fishing boats always leave the harbor on the ebb.

漁船總是趁著退潮時離開港口。

衰退、低潮、衰落

Team morale was at a low ebb after three straight losses.

連輸三場後，隊上的士氣正處於低潮。

退潮、退去

As the tide ebbed, a wide stretch of mudflat appeared.

潮水退去後，露出一大片泥灘。

衰退、減弱、消退

His enthusiasm for the job slowly ebbed away.

他對這份工作的熱情漸漸消退了。

起落、消長、盛衰

The novel captures the ebb and flow of a long friendship.

這本小說寫出了一段長年友誼的起落。