This is the 10924th most frequent Korean word.
근육이
"근육이" means "muscles" in English.
In this sentence, '근육이' is used to describe physical attributes—having large and strong muscles.
그는 근육이 크고 강해서 운동선수로 적합합니다.
He has large and strong muscles, making him suitable as an athlete.
Here, '근육이' refers to the growth of the muscles as a result of consistent exercise.
지난달부터 매일 운동을 하니 근육이 생기기 시작했어요.
Since working out daily from last month, muscles have begun to develop.
In this instance, '근육이' describes the state of muscles, specifically being tense.