Iron

1. Made of the metal iron. He used an iron hammer.
2. Strong (as of will), inflexible. She had an iron will.
3. A common, inexpensive metal, often black in color, that rusts, is attracted by magnets, and is used to make steel.
4. Shackles. He was put into leg irons to constrain him.
5. A hand gun. He was carrying an iron for protection.
6. A dark shade of the color of silver. Some could say that the car was iron colored.