Definitions
- 1. to fail
- 2. to lose effectiveness
Word relationships
Antonyms
1 itemRelated words
1 itemSynonyms
2 itemsUsage notes
Collocations
常与‘过期’连用,如‘过期失效’,但‘失效’本身即可表达因时间而无效。
Common mistakes
‘失效’表示原本有效的东西变得无效,不用于描述未达到预期结果(此时用‘失败’)。例如不能说‘考试失效’。
Example Sentences
1 shown这张优惠券已经 失效 了。
This coupon has already expired.
AI-generated examples are marked with this icon.