The process of undergoing birth, or an archaic/dialectal form meaning being born; can refer to drilling a hole.
From bore (Old English 'borian,' to drill or pierce) + -ing (gerund suffix), or from an obsolete sense related to birth. Multiple etymologies possible.
In Scottish dialect, 'borning' meant childbirth, while in engineering it means drilling precision holes—same word, two entirely different worlds!
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