瑕疵 xiácī blemish
blemish; flaw; defect
How to remember 瑕疵: 瑕 fault + 疵 flaw = blemish.
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How it is used
- A flaw or blemish, esp. a small one on something otherwise fine - 这块玉毫无瑕疵 (zhè kuài yù háo wú xiácī) this jade is flawless.
- Literary/formal; used for jade, products, character, or arguments (小小的瑕疵, a minor imperfection).
- The idiom 完美无瑕 (wánměi wúxiá) = flawless; contrast plain 毛病 (máobìng), the everyday 'defect/fault'.