왼쪽 언덕 언 冈(언덕 그림), 오른쪽: 자를 자/칼 刂 Left: hill 冈 (part of steel: 钢, showing a bloomery hearth for steel smelting, in which iron ore and charcoal were stacked alternately as a hill), right: cutting/knife 刂
니모닉
(고기에 연골이 있을까요?) '언덕', 즉 두툼한 것은 칼로 (자를 때) 특히 단단합니다. From this hill/oven comes a (steel) knife that is hard & durable.