sagacity

UK: /səˈgæsəti/ US: /səˈgæsɪti/ ,(sə gas′i tē)

WordReference Random House Unabridged Dictionary of American English © 2025

sa•gac•i•ty  (sə gas′i tē), n. 

1. acuteness of mental discernment and soundness of judgment.

• Latin sagācitās wisdom, equivalent. to sagāci- (stem of sagāx) wise (akin to seek) + -tās -ty²
• 1540–50

Collins Concise English Dictionary © HarperCollins Publishers::

sagacity / səˈɡæsɪtɪ/ noun

1. foresight, discernment, or keen perception; ability to make good judgments

WordReference Random House Learner's Dictionary of American English © 2025

sa•ga•cious /səˈgeɪʃəs/   adj. 

1. having or showing wisdom; shrewd;
   wise:
   a sagacious lawyer.

sa•gac•i•ty /səˈgæsɪti/  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2025

sa•ga•cious  (sə gā′shəs), adj. 

1. having or showing acute mental discernment and keen practical sense;
   shrewd:
   a sagacious lawyer.
2. [Obs.] keen of scent.

• sagaci(ty) + -ous 1600–10

sa•ga′cious•ly, adv. 
sa•ga′cious•ness, n. 
Synonyms

• 1. wise, sage, discerning, clever, intelligent, judicious, acute, sharp, keen, perspicacious.

Antonyms

• 1. unwise.