From: John Hickey <6b4982e1e61a5fe58cc79b7da465ce9d@example.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: Etymological question -- "waller" a hole
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On an excavator's youtube work channel out of Derby Indiana, called Dirt Pefect, I just heard them say that vehicles repeatedly going through a low area in a filed had "wallered out a ditch."
In rural West Virginia I often heard this term used to mean the unintentional widening of a hole, like a bolt hole, and I may have heard it usd to meana the intentional wiening of a hole.
What I have not heard discussed here (?) is its use to mean the wearing away of threads on a bolt, which I also heard in West Virginia from auto mechanics.

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For full context, visit https://www.polytechforum.com/metalworking/etymological-question-waller-a-hole-592425-.htm