As a verb:
* The water was boiling on the stove. (meaning it was reaching a high temperature and bubbling)
* The pressure cooker was boiling the beans quickly. (meaning it was cooking them at a high temperature)
* His anger boiled over when he heard the news. (meaning his anger became intense and uncontrollable)
* The doctor had to boil the water to make it safe to drink. (meaning he had to heat it to a high temperature to kill bacteria)
As a noun:
* He had a nasty boil on his arm. (meaning a painful, pus-filled swelling on his skin)
* The chef added a boil to the water to make the pasta cook faster. (meaning a small amount of boiling water)
* The water reached a rolling boil. (meaning it was boiling rapidly)
The meaning of "boil" can vary depending on the context. It can be used to describe a physical process, an emotional state, or a medical condition.