This is the 484th most frequent Korean word.
경기에서
"In the game" or "during the match."
Here, '경기에서' is used to indicate the location or circumstance of the action, specifically 'in the match'.
그는 중요한 경기에서 승리를 거두었다.
He achieved a victory in the important match.
In this sentence, while similar in appearance to '경기에서', the term '경계에서' uses a different root and means 'at the boundary'.
태양은 경계에서 찬란히 빛나고 있었다.
The sun was shining brightly at the boundary.
Here, '경기에서' refers to 'in the game', highlighting the event during which the action takes place.