This is the 3898th most frequent Korean word.
역
"역" (yeok) in Korean means "station" or "role."
역 here refers to a train station.
역에서 기차를 탑니다.
At the station, one takes a train.
역 here refers to a role or character, as in a play or movie.
그의 역을 맡은 배우가 훌륭하게 연기했어요.
The actor who took on his role performed excellently.
역 in this case refers to reversed direction or counter.