pothole
Synonym discussion
Sense: noun/1
These words can all describe damage in the ground, but they point to different shapes and causes. A 'pothole' is the usual word for a rounded hole in a road that cars may hit. A 'rut' is long and narrow, usually made by wheels passing over soft ground again and again. A 'crack' is a split line in the surface and may be shallow, so it is earlier damage than a pothole. A 'sinkhole' is much larger and happens when the ground below collapses. In everyday driving English, you avoid or repair potholes, get stuck in ruts, notice cracks, and call emergency services if a sinkhole opens.
Etymology
The word joins 'pot' and 'hole'. It was first used for rounded holes worn into rock by moving water, probably because their bowl-like shape looked like a pot. English later extended the word to similar holes in road surfaces, and then to small setbacks in a plan or process.