"She could not compose herself— Mr. Woodhouse would be alarmed—she had better go;"—with most ready encouragement from her friend, therefore, she passed off through another door—and the moment she was gone, this was the spontaneous burst of Emma’s feelings: "Oh God! that I had never seen her!"
There are no more uses of "spontaneous" in the book.
Show samples from other sources
The group broke into spontaneous laughter.
He bubbled with enthusiasms, and his faintest smile or lightest laugh seemed spontaneous and genuine.