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无效

無效
wúxiào
adjective HSK 6 #4,861

Meanings

  1. 1 ineffective; invalid; null and void

Characters

无
wú
without; none; not
效
xiào
effect; result; to imitate
Without effect - something that doesn't work or isn't valid.

Examples

HSK 3
这种药对他无效。
Zhèzhǒng yào duì tā wúxiào.
This medicine has no effect on him.
HSK 4
这张合同已经无效了。
Zhè zhāng hétóng yǐjīng wúxiào le.
This contract is already invalid.
HSK 6
法院宣布选举无效。
Fǎyuàn xuānbù xuǎnjǔ wúxiào.
The court declared the election invalid.

Tips

usage
无效 is the opposite of 有效 (valid/effective). Common collocations: 合同无效 (contract is void), 治疗无效 (treatment was ineffective), 宣布无效 (declare invalid), 无效投票 (invalid ballot).

Stroke Order

无 wú
效 xiào