(boil) v.i.
1. To be agitated, as a liquid, by gaseous bubbles rising to the surface; also said of the container in reference to the contents: The kettle boils.
2. To reach the boiling point.
3. To undergo the action of a boiling liquid, as meat.
4. To be agitated; to seethe: The water boiled with sharks.
5. To be stirred or agitated, as by violent emotion.
—v.t.
6. To bring to the boiling point.
7. To cook or cleanse by boiling: to boil rice; to boil shirts.
8. To separate by means of evaporation caused by boiling: to boil sugar.
—to boil away To evaporate in boiling.
—to boil down
1. To reduce in bulk by boiling.
2. To condense; edit.
—to boil over
1. To overflow (the container) while boiling.
2. To become enraged.
—noun
1. The act or state of boiling.
2. An immersion in boiling water. [<OF boillir <L bullire boil]

(boil) noun Pathol.
A purulent and painful nodule of bacterial origin lodged beneath the skin; a furuncle. [OE byl, byle]