goad

Short definition from Wiktionary

Noun

1. 1
   A long, pointed stick used to prod animals.
2. 2
   That which goads or incites; a stimulus.

Verb

1. 1
   To prod with a goad.
2. 2
   To encourage or stimulate.
3. 3
   To incite or provoke.

Proper noun

1. 1
   A surname.