transitive verb seethed, seething seeth′·ing

1. to cook by boiling
2. to soak, steep, or saturate in liquid

Etymology: ME sethen < OE sēothan, akin to Ger sieden < IE base *sew-, to cook, boil > Sans hāvayan, (they) stew

intransitive verb

1. to boil or to surge, bubble, or foam as if boiling
2. to be violently agitated or disturbed

noun