This is the 854th most frequent Korean word.
강
The Korean word "강" means "river."
Here, "강" is used to refer to a natural river.
한강은 서울을 가로지르는 유명한 강입니다.
The Han River is a famous river that flows through Seoul.
In this usage, "강" relates to being strong or powerful.
그는 체력이 강해서 어떤 일도 잘 해낼 수 있어요.
He is strong in stamina, so he can handle any task well.
Here "강" is part of "강수량," meaning precipitation or rainfall, showing its usage in a compound noun.