Its owner was a Mr. Frederick, a tough, shrewd man, perpetually involved in lawsuits and with a name for driving hard bargains.
They put it about that the animals on the Manor Farm (they insisted on calling it the Manor Farm; they would not tolerate the name ’Animal Farm’) were perpetually fighting among themselves and were also rapidly starving to death.
There are no more uses of "perpetual" in the book.
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A perpetual flame burns beside the grave of John F. Kennedy.