expression, i-adjective
quick on the uptake; sharp; perceptive
Describes someone who grasps things quickly, catches on fast, or is mentally sharp. It is a rare term, but the concept is common; the phrase itself may be less frequent than synonyms like 飲み込みが早い.
彼は悟りが早いから、一度説明すれば十分だ。
He's quick on the uptake, so explaining once is enough.
新入社員の中でも、彼女は特に悟りが早い。
Among the new employees, she is especially sharp.
Phrase combining 悟り (understanding, perception, from verb 悟る) + が + 早い (fast). The kanji 悟 suggests spiritual or deep understanding, but the phrase is used for general quick-wittedness.