機敏

1. Origins, structure, and basic meaning

• Structure: 機敏 (きびん) describes alert, agile response or movement. The examples use adverbial and attributive forms.
• Basic usage: A clerk responds promptly to a request; a cat reaches a high wall with agile movement.

2. Common pitfalls and similar expressions

• Quick service requiring judgment and agile bodily movement
  • 機敏に modifies how the clerk responds, while 機敏な modifies the movement itself. The word can include responsiveness and appropriateness, not speed alone.