bump

她摔倒后头上有个讨厌的肿块。

She has a nasty ___bump on her head from the fall.

他额头上的肿块开始消退了。

The ___bump on his forehead is starting to go down.

在这条路上要小心；前面有个大凸起。

Be careful on this road; there's a big ___bump ahead.