to force a person or animal to leave a place where they are hiding

Planes bombed the guerrilla positions yesterday in an attempt to flush out snipers from underground tunnels. 飞机昨天轰炸了游击队的驻地，试图把狙击手从地下坑道中逼出来。

We used a dog to flush the rabbits out. 我们用一条狗把那些野兔赶出来。

to do something in order to discover people who have been dishonest

By cross-checking claims, we will flush out the fraudsters. 通过反复核对索赔请求，我们会把欺诈者揪出来的。

to remove something using a sudden flow of water

Drink a lot of water to flush the toxins out of your system. 大量饮水来清除体内的毒素。