어느 저녁, 그는 오래된 나무 아래에서 쉬고 있을 때, 나뭇잎 사이로 신비한 목소리가 들려왔습니다.1 One evening, while he was resting under an old tree, he heard a mysterious voice through the leaves.
나뭇잎 means ‘leaf’, composed of 나무 (tree) and 잎 (leaf). ㅅ is a liaison consonant used in compound nouns to phonetically link the two parts.