纤维 xiānwéi fiber
How to remember 纤维: 纤 fine + 维 to preserve = fiber.
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How it is used
- Fiber - both material and dietary - 合成纤维 (héchéng xiānwéi) synthetic fiber; 膳食纤维 dietary fiber.
- Note reading xiān (纤 is xiān here, meaning fine/slender), a common misreading trap.
- Technical/everyday-health vocabulary; also 神经纤维 nerve fiber.