seethe

Of a liquid or other substance, or a container holding it: to be boiled (vigorously); to become boiling hot.

Of a liquid, vapor, etc., or a container holding it: to foam or froth in an agitated manner, as if boiling.

Of a person: to be in an agitated or angry mental state, often in a way that is not obvious to others.

Of a place: to be filled with many people or things moving about actively; to buzz with activity; also, of people or things: to move about actively in a crowd or group.

Of a place: to have inhabitants in an angry or disaffected mood; to be in a state of unrest.

To overboil (something) so that it loses its flavour or texture; hence (figurative), to cause (the body, the mind, the spirit, etc.) to become dull through too much alcoholic drink or heat.

To soak (something) in a liquid; to drench, to steep.

To boil (something); especially, to cook (food) by boiling or stewing; also, to keep (something) boiling.

Of the stomach: to digest (food).