Gad

1. A sharp-pointed rod; a goad.
2. A pointed or wedge-shaped instrument of metal, as a steel wedge used in mining, etc.
3. A wedge-shaped billet of iron or steel.
4. To walk about; to rove or go about, without purpose; hence, to run wild; to be uncontrolled.
5. A rod or stick, as a fishing rod, a measuring rod, or a rod used to drive cattle with.
6. The point of a spear, or an arrowhead.
7. A spike on a gauntlet; a gadling.