"seething" in the verb sense
1. hum, buzz, seethe
be noisy with activity
"This office is buzzing with activity"
2. seethe, boil
be in an agitated emotional state
"The customer was seething with anger"
3. seethe
foam as if boiling
"a seething liquid"
4. seethe, roll
boil vigorously
"The liquid was seething"
"The water rolled"
"seething" in the adjective sense
1. seething
in constant agitation
"a seething flag-waving crowd filled the streets"
"a seething mass of maggots"
"lovers and madmen have such seething brains"- Shakespeare
Source: WordNet® (An amazing lexical database of English)
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