Wiktionary:Word of the day/2023/December 16

1. (intransitive)
   1. Of a liquid or other substance, or a container holding it: to be boiled (vigorously); to become boiling hot.
   2. (figurative)
      1. Of a liquid, vapour, etc., or a container holding it: to foam or froth in an agitated manner, as if boiling.
      2. Of a person: to be in an agitated or angry mental state, often in a way that is not obvious to others.
      3. 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.
      4. Of a place: to have inhabitants in an angry or disaffected mood; to be in a state of unrest.
2. (transitive)
   1. (archaic, chiefly passive voice)
      1. 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.
      2. To soak (something) in a liquid; to drench, to steep.
   2. (obsolete)
      1. To boil (something); especially, to cook (food) by boiling or stewing; also, to keep (something) boiling.
      2. (obsolete, physiology) Of the stomach: to digest (food).

seethe n

1. (chiefly figurative) A state of boiling or frothing; ebullition, seething; hence, extreme heat; much activity.