seething /ˈsiː.ðɪŋ/adjective 3noun 1forms 1 adjective3 •In a state of extreme volatility; about to boil over; boiling, bubbling.There Grendel was watching his blood flow out into the seething tarn. — 1961 •Filled with unexpressed anger; in a state of being livid. •In a state of unceasing and furious activity. noun1 •The action of the verb to seethe. formsseethings
