inscrutable
🇺🇸
/ɪnˈskruːtəbl/
🇬🇧
/ɪnˈskruːtəbl/
difficult to understand or read
His facial expression was inscrutable, making it hard to tell what he was thinking.
그의 표정은 알 수 없었고, 그가 무슨 생각을 하고 있는지 알기 어려웠습니다.