SAGACITY
judiciousness, sagacity, sagaciousness
(noun) the trait of forming opinions by distinguishing and evaluating
sagacity, sagaciousness, judgment, judgement, discernment
(noun) the mental ability to understand and discriminate between relations
Source: WordNet® 3.1
Etymology
Noun
sagacity (usually uncountable, plural sagacities)
(obsolete) Keen sense of smell.
The quality of being sage, wise, or able to make good decisions; the quality of being perceptive, astute or insightful.
Synonyms: sagaciousness, wisdom
Source: Wiktionary
Sa*gac"i*ty, n. Etym: [L. sagacitas. See Sagacious.]
Definition: The quality of being sagacious; quickness or acuteness of sense
perceptions; keenness of discernment or penetration with soundness of
judgment; shrewdness.
Some [brutes] show that nice sagacity of smell. Cowper.
Natural sagacity improved by generous education. V. Knox.
Syn.
– Penetration; shrewdness; judiciousness.
– Sagacity, Penetration. Penetration enables us to enter into the
depths of an abstruse subject, to detect motives, plans, etc.
Sagacity adds to penetration a keen, practical judgment, which
enables one to guard against the designs of others, and to turn
everything to the best possible advantage.
Source: Webster’s Unabridged Dictionary 1913 Edition