失效 shīxiào to fail
to fail; to lose effectiveness
怎么记住“失效”: 失 to lose + 效 result = to fail.
汉字
用法
- To lose effect / expire / fail - 药物失效 (yàowù shīxiào) the medicine stops working; 合同失效 (hétong shīxiào) the contract lapses.
- About losing validity or effectiveness; contrast 生效 (shēngxiào, to take effect). Neutral/formal.