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perspicacious

[pur-spi-key-shuh s]
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adjective
  1. having keen mental perception and understanding; discerning: to exhibit perspicacious judgment.
  2. Archaic. having keen vision.

Origin of perspicacious

First recorded in 1610–20; perspicaci(ty) + -ous
Related formsper·spi·ca·cious·ly, adverbper·spi·ca·cious·ness, noun
Can be confusedperspicacious perspicuous

Synonyms

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1. perceptive, acute, shrewd, penetrating.

Antonyms

1. dull, stupid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for perspicaciousness

perspicacious

adjective
  1. acutely perceptive or discerning
  2. archaic having keen eyesight
Derived Formsperspicaciously, adverbperspicacity (ˌpɜːspɪˈkæsɪtɪ) or perspicaciousness, noun

Word Origin

C17: from Latin perspicax, from perspicere to look at closely; see perspective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for perspicaciousness

perspicacious

adj.

1630s, formed as an adjective to perspicacity, from Latin perspicax "sharp-sighted, having the power of seeing through; acute" (see perspicacity). Related: Perspicaciously; perspicaciousness.

Online Etymology Dictionary, © 2010 Douglas Harper