na-adjective, noun
intelligent; shrewd; sharp-witted
Rare literary word describing a person of keen intelligence and insight. Mostly found in older texts or formal writing.
彼は穎悟な人物として知られていた。
He was known as a person of keen intelligence.
その少年の穎悟さには教師たちも驚いた。
The teachers were amazed at the boy's sharp-wittedness.