scrud

This word derives from the Old English for 'shroud' and eventually became part of the word scrotum, since a shroud, like a scrotum, is "something that covers, veils, etc."

Beowulf donned his battle-scrud.

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churn rate

The rate at which customers / subscribers / sumbitters stop using a product or service divided by the average number of customers / subscribers / submitters. Useful for determining growth trends versus customer satisfaction.

AOL's high churn rate indicates a low level of customer satisfaction.

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