This is the 4318th most frequent Russian word.
барьер
Barrier; obstacle.
барьер here refers to a physical obstacle.
Спортсмен преодолел высокий барьер на стадионе.
The athlete overcame a high barrier at the stadium.
барьер here refers to a figurative obstacle, specifically in communication.
Языковой барьер мешает мне свободно общаться.
The language barrier prevents me from communicating freely.
барьер in this context means a figurative obstacle in relationships.