灌木丛用英语可以说是 a bush. "Bush" 这个词的来源可以追溯到古英语 "bosc" 或 "bosk"，它们都有树丛、灌木丛的意思。例如：

The bush was so thick that we couldn't see what was on the other side. (这片灌木丛太浓密了，我们看不到另一边的景色。)

We hiked through the bush for hours before we finally reached our destination. (我们穿过灌木丛走了好几个小时，最后终于到达了目的地。)