clothes, clothing radical (no. 145
衤 is the clothing radical, used as a component in characters related to clothes and garments. Its standalone meaning is simply 'clothes' or the radical itself.
衤 is a simplified form of 衣 (clothing) used as a left-side radical. It derives from the pictograph of a garment, with the modern form showing a stylized collar and sleeve.
The shape of 衤 looks like a person wearing a robe with a collar and a sleeve hanging down. Picture a simple garment draped over a figure.
For ころも, imagine a traditional Japanese robe, a koromo, draped over a stand. The word koromo itself is the reading, so remembering the garment directly ties to ころも.
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