위: 구멍, 구멍 穴(덮여 있고 宀 좁은 길 八이 동굴로 통한다), 아래: 능숙할 巧(장인 工이 미역 丂을 아주 능숙하게 작업한다). Top: hole, cavity 穴 (It is covered 宀 and a narrowing path 八 leads into the cave), below: skilled 巧 (The craftsman 工 works the seaweed 丂 skillfully.)
니모닉
동굴을 능숙하게 (파는) 사람은 똑똑하다. (It could collapse at any time:) Whoever builds his cave skillfully, is intelligent.
