slacken

放鬆、鬆開、變鬆

He slackened the rope so the boat could drift a little.

他把繩子放鬆，讓船可以稍微漂移。

放慢、減緩

The train slackened its speed as it approached the station.

火車接近車站時放慢了速度。

減弱、減退

Demand for new houses has slackened in recent months.

近幾個月來新屋的需求已經減弱。

鬆懈、懈怠

We must not slacken our efforts in the final week.

最後一週我們絕不能鬆懈努力。

減弱、放慢、趨緩

The rain finally slackened off around midnight.

雨勢到了半夜終於減弱。