To make pointed or sharp; to sharpen or render acute.
From Latin exacinus or exacuare (ex- 'out' + acinus 'sharp point'). An extremely rare verb, possibly confused with or derived from acuate meaning 'pointed.'
This word is so obscure that even major dictionaries question whether it truly exists as a distinct word—it might be a ghost word, a term that was copied from mistake to mistake through history.
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