1. to squeeze (transitive)

2. to tighten, constrict or compress (transitive)

3. to press (e.g., a button) (transitive)

4. to pull (e.g., the trigger) (transitive)

5. to grit (e.g., one's teeth), to clench (e.g., one's fist) (transitive)

6. to push down (e.g., a toilet plunger) (transitive)

7. to hold back (transitive)

8. to hold on to (something) (transitive)

9. to intensify (intransitive)

10. to start (an action) (colloquial)