a seething 'cauldron' of intense emotions
The area was a 'cauldron' of violence.
a witch's 'cauldron'
(..) Sir? Mr. Malfoy. Mr. Malfoy! l have something of yours. Mine? l don't know what you're talking about. l think you do, sir. l think you slipped the diary into Ginny Weasley's cauldron. . . . . .that day at Diagon Alley. You do, do you? Why don't you prove it? Come, Dobby. Open it. Dobby. (..)2002 Harry Potter and the Chamber of Secrets