Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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They began knocking scales loose with the jackhammer and cutting into the leathery skin underneath with sonocutters.

The noise a jackhammer makes isn't pleasant at all, but if it doesn't make that noise, you figure it isn't functioning properly.

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.