dilute

她加了点水把汤稀释，好让全家人够喝。

She added some water to ___dilute the soup so it would feed the whole family.

往果汁里加水会冲淡它的味道。

Adding water to the juice will ___dilute its flavor.

妈妈让我把果汁加点水稀释一下，这样不会太甜。

Mom asked me to ___dilute the juice a little so it wouldn't be too sweet.