verb
seethe
SEETHE/siːð/
To churn with intense bubbling motion.
The broth seethes in the pot.

Etymology
Old English seoþan meant “to boil” and also described a troubled mind. The anger sense turns physical boiling into inward agitation: someone can be emotionally boiling while showing little outwardly.
More examples
- The river seethes around the rocks below the waterfall.
- Seething lava fills the crater.
- The stew seethed until I turned down the heat.
Forms
seethe · seethes · seethed · seething