Emery (noun)

1. A hard mineral consisting of corundum and either hematite or magnetite, used for grinding and polishing.
2. A type of abrasive paper or cloth coated with emery powder, used for polishing or sharpening tools.

Origin:

From middle english emeri, from old french émeri, from medieval latin emārius, from latin haematites, from ancient greek ἐμάριος (emários, "red ochre").

Examples:

1. The workers used an emery wheel to sharpen the knives.
2. She used emery paper to smooth the rough edges of the wood.
3. The jeweler used a fine emery powder to polish the diamond ring.
4. The mechanic use emery cloth to remove rust from the tool.
5. The handyman use a emery board to smooth the nails.