spontaneous
used in Lord of the Flies

only 1 use

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Definition

behaving in an instinctive, uninhibited manner

or:

happening naturally (without planning or external force)

Spontaneously they began to clap and presently the platform was loud with applause.
p. 37.9

There are no more uses of "spontaneous" in Lord of the Flies.

Typical Usage (best examples)