This is the 3361st most frequent Dutch word.
knappe
Attractive, handsome, or clever.
Here, "knappe" is an adjective describing physical appearance (handsome).
Hij is een knappe jongen.
He is a handsome boy.
In this sentence, "knappe" refers to being impressive or skillful.
Dat was een knappe prestatie.
That was an impressive performance.
In this context, "knappe" metaphorically refers to brightness or liveliness.