Merchant ships are but extension bridges; armed ones but floating forts; even pirates and privateers, though following the sea as highwaymen the road, they but plunder other ships, other fragments of the land like themselves, without seeking to draw their living from the bottomless deep itself.
Once a vagabond on his own canal, I have received good turns from one of these Canallers; I thank him heartily; would fain be not ungrateful; but it is often one of the prime redeeming qualities of your man of violence, that at times he has as stiff an arm to back a poor stranger in a strait, as to plunder a wealthy one.
There are no more uses of "plunder" in the book.
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The conquerors plundered the town and surrounding countryside.
The pirates plundered small towns on that part of the coast.