HSK V7-9
Correct

失效

/ shīxiào / 
Strokes

Definition

to fail/to lose effectiveness

Example

As a Verb
lose efficacy/effectiveness; cease to be effective; be no longer in force; become invalid
1
Tā
他
de
的
bǎoxiǎndān
保险单
yǐ
已
shīxiào
失效
  
。

His insurance policy has lapsed.

2
Chāoguò
超过
qīxiàn
期限
  
,
zhuānlìquán
专利权
jiù
就
huì
会
shīxiào
失效
  
。

Beyond the time limit, patent rights will lose their efficiency.

3
Zhè
这
yào
药
yǐjīng
已经
shīxiào
失效
  
。

The medicine no longer has any effect. / This medicine has lost its strength.

4
Zìdòng
自动
shīxiào
失效

automatically cease to be in force