percipient

/pərˈsɪpiənt/
adjective
  1. Having or showing the ability to notice and understand things quickly and clearly; perceptive.
    • A percipient observer can often predict the outcome of a situation.
    • Her percipient comments during the meeting helped the team see the problem differently.
    • The percipient student noticed the error in the textbook immediately.
Antonyms
noun
  1. A person who is able to perceive or understand things quickly and clearly.
    • In the story, the old wizard was a percipient who saw beyond appearances.
    • As a percipient of human nature, she could always tell when someone was lying.
    • The jury needed a percipient to explain the complex evidence.