ETYM Old Eng. nute, note, as. hnutu; akin to Dutch noot, German nuss, Old High Germ. nuz, Icel. hnot, Swed. nöt, Dan. nöd.
1. A small square or hexagonal metal block with internal screw thread to be fitted onto a bolt.
2. A hard problem or undertaking; core, heart.
3. A perforated block usually of metal that has an internal screw thread and is used on a bolt or screw for tightening or holding something.
4. The ridge in a stringed instrument (as a violin) over which the strings pass on the upper end of the fingerboard.
5. A small lump (as of butter).
6. A foolish, eccentric, or crazy person; enthusiast. + prikaži više

Ring used to tighten and close a screw, ring through which a screw is placed