LATIN DICTIONARYLexicon Latīnum
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“sagacity” in Latin

The English word sagacity itself goes back to Latin sāgiō, through sagācitās.

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

sagacity
sagacitas (power of tracing things to their causes; by metonymy, from hounds): 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). To possess natural sagacity, natura acutum esse: such is his own sagacity, qua est ipse sagacitate.

Quick answer

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