顽固 wángù stubborn
stubborn; obstinate
How to remember 顽固: 顽 stubborn + 固 to solidify = stubborn.
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How it is used
- Stubborn / obstinate - clinging to a position against reason - 他很顽固，谁劝都没用 (tā hěn wángù, shéi quàn dōu méi yòng) he's so stubborn, no one can talk him round.
- Negative; also 'stubborn/hard to eradicate' for problems (顽固的污渍 a stubborn stain; 顽固分子 a diehard).
- Contrast 固执 (gùzhí, insistently set in one's ways) - 顽固 is stronger, implying rigid, unyielding, often reactionary stubbornness.