oilstone
/ˈɔɪlˌstoʊn/
noun
- A fine-grained stone used with oil for sharpening cutting tools like knives or chisels.
- After a few passes on the oilstone, the blade was razor-sharp again.
- The carpenter kept an oilstone in his toolbox for maintaining his chisels.
- He used an oilstone to sharpen the kitchen knife before dinner.
Synonyms