a hole in a road surface that results from gradual damage caused by traffic and/or weather

The car's suspension is so good that when you hit a pothole you hardly notice it. 这部车的悬架减震性很好，碰到路面的坑洼几乎察觉不到。

a deep hole formed underground in limestone areas by the gradual rubbing and dissolving action of water flowing through the stone

a problem

The road to economic recovery is full of potholes. 经济复苏之路充满了艰辛。