noun
knack
NAK/næk/
A special skill or clever way of doing something.
She has a knack for holding a nail safely with a comb.

Etymology
The origin is uncertain. An earlier knack meant “trick” or “device,” suggesting a possible shift from a clever contrivance to practical skill—but only if these are indeed the same word.
In context
Though I d given up, unable to endure the hardship, I still understood the knack of it and had actually practiced, so my archery had reached the beginner stage.