Definition
失效 (shī xiào) means 'to lose effectiveness' or 'to become invalid', typically due to expiration or environmental factors (e.g., medicine, contracts). It contrasts with 无效 (wú xiào) 'invalid state' and 作废 (zuò fèi) 'deliberate cancellation'; its opposite is 生效 (shēng xiào) 'take effect', while 见效 (jiàn xiào) means 'produce a desired result'.
verb
to lose effectivenessto become invalid (of documents, medicine, contracts, etc.)
Examples
- 失效。Zhè zhāng yínhángkǎ yǐjing shī xiào le.This bank card is already invalid.
- 失效。Zhè zhǒng yào zài yángguāng xià róng yì shī xiào.This medicine easily loses effectiveness in sunlight.
- 失效。Hétong shī xiào hòu xūyào chóngxīn qiāndìng.After the contract becomes invalid, it needs to be re-signed.
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