millstone
/ˈmɪlˌstoʊn/
noun
- One of a pair of large, flat, circular stones used for grinding grain in a mill.
- The grooves on the millstone helped crush the wheat efficiently.
- The miller replaced the worn millstone with a new one from the quarry.
- Grain was fed between the two millstones to make flour.
- A heavy burden or responsibility that is difficult to bear.
- She felt the millstone of caring for her aging parents alone.
- The failed project was a millstone that dragged down the whole company.
- The debt became a millstone around his neck.