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失效

shīxiào
verb HSK 7 #6,853

Meanings

  1. 1 to lose effectiveness
  2. 2 to expire; to become invalid

Characters

失
shī
to lose
效
xiào
effect; effectiveness
Literally 'lose effect' — something no longer works or is no longer valid.

Examples

这张优惠券已经失效了。
Zhè zhāng yōuhuìquàn yǐjīng shīxiào le.
This coupon has already expired.
药物放太久会失效。
Yàowù fàng tài jiǔ huì shīxiào.
Medicine will lose its effectiveness if stored too long.

Tips

usage
失效 applies to anything that stops working or becomes invalid: medicine, contracts, coupons, passwords, laws. The opposite is 生效 (to take effect).

Stroke Order

失 shī
效 xiào