This is the 17989th most frequent Korean word.
수비의
Defensive.
The word '수비의' is used here as an attributive adjective describing '핵심 역할' (key roles) pertaining to defense.
그는 여러 스포츠에서 수비의 핵심 역할을 맡았어요.
He took on key defensive roles in various sports.
In this sentence, '수비의' modifies '위치' (positions), indicating positions that are associated with defense.
수비의 위치를 잘 이해하는 것이 중요합니다.
Understanding defensive positions is important.
Here, '수비의' is used to describe '전략' (strategies) related to the concept of defense.