Yéye zhòng le yíbèizi dì, shǒuzhǎng shàng quán shì hòuhòu de piánzhī.
Grandpa farmed all his life, and his palms are covered in thick calluses.
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A written and medical word. In everyday speech a callus is 老茧 or 茧子. It lives on in the idiom 胼手胝足, hands and feet calloused from hard work, and in anatomy in 胼胝体, the corpus callosum that joins the two halves of the brain.
