This is the 14336th most frequent Korean word.
못하기
The Korean word "못하기" means "not being able to do."
In this sentence, '못하기' is used to express the inability or lack of skill in swimming.
그는 수영을 못하기 때문에 물에 들어가지 않아요.
He doesn't go into the water because he can't swim.
Here, '못하기' denotes the inability or lack of efficiency in studying.
공부를 못하기 때문에 성적이 낮아요.
His grades are low because he can't study well.
'못하기' in this context indicates the lack of capability or skill in cooking.