Mrs. Merton had undertaken the duties that appertain to the "hissing urn."
He paced the chamber like a beast in a cage, hissing out the words in his anger.
Her hissing and sucking might have been a living gasp for breath.
Then he flew up from the book with a hissing sound, like a radiant streak.
In a moment the door was closed behind him, air was hissing into the lock again.