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“sharpen” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

sharpen
praeacuere (to make pointed at the end or in front): acuere: exacuere (to make sharp or pointed in general): acuminare: cuspidare (to put on a point at one end or in front, to fix a pointed head): cuneare (in the shape of a wedge). To sharpen on a whetstone, cote acuere aliquid.

Quick answer

What is the Latin word for sharpen?
The usual Latin words for “sharpen” are acuō, exacuō, acūminō; also cuspidō, cuneō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.