noun
a soft sandstone used for scrubbing the decks of a ship
verb
to scrub or clean with a holystone
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Sailors used holystones to scrub the decks of the ship.
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Hey, can you pass me that holystone so I can clean up this mess?
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I hate holystoning the deck, it's such a pain.
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She holystoned her mind, clearing away all negative thoughts.