The book of Proverbs was written almost three thousand years ago and preserves truth gathered well
prior to that. It is genuinely ancient, and comes out of a cultural setting (or
really, cultural settings, plural) with which we can only pretend to be even
slightly familiar.
Thus, even if we study and research until the cows come home, we should not be the least bit surprised
to find that there are occasional words and phrases in Proverbs that we just
can’t parse properly. We can make educated guesses. We can eliminate ridiculous
suggestions (of which there are more than a few). But in some cases we will
have to content ourselves with being less than 100% sure what a particular word,
phrase or sentence really means.