Indeed, many are the Nantucket ships in which you will see the skipper parading his quarter-deck with an elated grandeur not surpassed in any military navy; nay, extorting almost as much outward homage as if he wore the imperial purple, and not the shabbiest of pilot-cloth.
There are no more uses of "extortion" in the book.
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Dishonest officials undermine faith in government through extortion of fees for performing their sworn duty.
She received an extortion note threatening to harm her children if she did not hand over $100,000.