quickness; alacrity; promptness
Describes swift, efficient action or mental agility. Often used in formal or written contexts; less common in casual speech.
Thanks to his prompt response, the problem was resolved quickly.
He has a quick mind.
Compound of 敏 (quick, agile) and 活 (lively, active). The exact historical derivation is uncertain, but the kanji combination suggests a Sino-Japanese origin.