1. grind
  2. sandstone

CEDICT

  1. (obsolete on its own in Standard Chinese) to whet; to sharpen
  2. (obsolete on its own in Standard Chinese) whetstone
  3. to whet; to sharpen
  4. whetstone

Wiktionary

  1. 磨刀石
  2. 参见砥砺

重編國語辭典

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