https://www.wordnik.com/lists/dead-as-a-doornail--by-charlaine-harris
Wordnik: Dead as a Doornail, by Charlaine Harris
Wordnik List: Dead as a Doornail, by Charlaine Harris
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https://www.upworthy.com/origin-of-dead-as-a-doornail/
The fascinating origin of the phrase "dead as a doornail" - Upworthy
Feb 18, 2026 - Why do we say "dead as a doornail" and not just "dead as a nail"? This helpful video gives and explanation as well as a demonstration of deadnailing.
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