灵 (líng): ด่วน

This child has very sharp ears; even when we speak softly in the next room, he can hear clearly.

He has a keen sense of smell; as soon as he entered, he smelled the aroma coming from the kitchen.

This news spread remarkably quickly; within half a day, the whole school knew.

This medicine really works; within ten minutes of taking it, my headache was gone.