LATIN DICTIONARYLexicon Latīnum
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“acuteness” in Latin

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

acuteness
ingenii acumen or acies (the former implying more of depth; of original and inventive ability) and acumen only: perspicacitas: prudentia perspicax (insight, taking in all at one glance): subtilitas (fine discrimination): sagacitas (the power of accurate investigation). Acuteness in disputation, acumen disserendi. To possess natural acuteness, natura acutum esse.
Of sight, acies oculorum.

Quick answer

What is the Latin word for acuteness?
The usual Latin words for “acuteness” are aciēs, acūmen, perspicācitās; also subtīlitās, sagācitās. 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.