1. To be employed; SYN. do work.
2. To cause to work; SYN. put to work.
3. To exert oneself by doing mental or physical work.
4. To ferment; SYN. operate.
5. To have a desired effect; do the trick; SYN. act.
6. To move in an agitated manner
7. To operate in a certain place, area, or specialty
8. To shape, form, or improve something:; SYN. work on, process.
9. To work one's way through a problem or task