"Pleonasm is often used for emphasis, as in free gift, true fact, or revert back. While such repetition is discouraged, sometimes it becomes part of the language and is used idiomatically, as in a hot water heater."

Would that be idiomatically or idiotically? A "hot water heater" should be a superheater to produce steam but invariably seems to be in some (idiot's) home whenever mentioned. [It does seem like the season for the Grinch to appear even on AWAD.]

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