whetstone

• Mrs. Blackstone continued sharpening her carving knife on her whetstone, her way of relieving her frustration, and continued the attack. —  EQMM, Sep/Oct 2005
• And with blogging there is nothing I enjoy more than getting comments and emails where the reader disagrees with me so thoroughly that just contemplating how to respond acts as a whetstone to sharpen my mind. —  Planck's Constant
• Be able to sharpen knives using either a grindstone, whetstone, the edge of an iron stove or another knife 11. —  Scouting For Girls, Official Handbook of the Girl Scouts
• So, putting into his bosom a whetstone and a razor, he went among the populace having in his mind that the whetstone should be cut by the razor,--a thing that is impossible. —  Dio's Rome, Volume 1 (of 6) An Historical Narrative Originally Composed in Greek during the Reigns of Septimius Severus, Geta and Caracalla, Macrinus, Elagabalus and Alexander Severus: and Now Presented in English Form
• On the other hand, his illustrious scholar aided him, in his old age and poverty, out of his scanty income Petrarch used to compare Convennole to a whetstone, which is blunt itself, but which sharpens others. —  The Sonnets, Triumphs, and Other Poems of Petrarch

Allen's Synonyms and Antonyms

Used in the Same Context