失效
shīxiào
to lose effectiveness, to expire
Part of speech · verb
Pattern visualization
no decomposition available
Examples
- 这张优惠券已经失效了。This coupon has already expired.
- 高温会使药品失效。High temperatures can make medicine lose its effect.
Collocations
合同失效自动失效失效日期彻底失效
Mnemonic
失 shī "to lose" + 效 xiào "effect, validity": to lose effect, i.e. to become void, to expire, to lapse. Same as the Korean word sil-hyo (失效). A contract, coupon or medicine ceasing to be valid (合同失效 a contract lapsing). Its opposite is 生效 (to take effect). 失 means "to lose" (失去); 效 means "effect, to emulate" (效果 effect, 有效 valid). The antonym hinges on 失 "lose" vs 生 "arise".
Related
生效过期作废无效
Quick check
What is the opposite of 失效?