这药失效了。
This medicine lost its effect.
失效
to fail; to lose effectiveness
verb HSK 3.0 · Band 7
Watch it being written
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
失
效
Nice writing!
Build with these blocks
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
失
See it in sentences
合同失效了。
The contract expired.