[书] Ⅰ （石头受水浪冲涮后形成的裂纹） marks, cracks or perforations on rocks made by action of waves Ⅱ ❶ （书写） write: 手 ～ written with one's own hand ❷ （石头裂开） (of rocks) split according to their natural veins ❸ （雕刻） carve; inscribe: ～ 石 inscribe characters on a stone tablet