1. to boil (to begin to turn into a gas) (intransitive)

2. to boil, to bubble, to churn (to be agitated like boiling water; to bubble; to effervesce) (intransitive)

3. to bustle (to move busily and energetically) (intransitive)

4. to bubble, to bubble up, to well up (to churn or foment, as if wishing to rise to the surface) (figurative, figuratively)

5. to teem, to abound (intransitive)

6. to move, to budge (part of one's body) (transitive)