요령이 · 요령을
knack, trick, the hang of it; gist; (요령을 피우다) shirking
Example
처음에는 어려웠는데 이제 요령이 생겼어요.
It was hard at first, but now I've got the hang of it.
Word parts
요 key, waist+령 collar, lead
Literally 'waist and collar' — grabbing a garment by its key points, so 'the essentials'.
Good to know
Positive as a knack (요령이 있다), but 요령을 피우다 means 'to cut corners, to slack off'.