perspicacious

American  

[pur-spi-key-shuhs] / ˌpɜr spɪˈkeɪ ʃəs /

adjective

1. having keen mental perception and understanding; discerning.

   to exhibit perspicacious judgment.

   Synonyms:

   penetrating, shrewd, acute, perceptive

   Antonyms:

   stupid, dull

2. Archaic. having keen vision.

---

perspicacious British  

/ ˌpɜːspɪˈkeɪʃəs, ˌpɜːspɪˈkæsɪtɪ /

adjective

1. acutely perceptive or discerning

2. archaic having keen eyesight

---

Other Word Forms

• perspicaciously adverb
• perspicaciousness noun
• perspicacity noun

Etymology

Origin of perspicacious

First recorded in 1610–20; perspicaci(ty) + -ous