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Open the tool →百无失一 (bǎi wú shī yī) is a Chinese idiom (chengyu) meaning “to be absolutely infallible”.
百无失一 is pronounced bǎi wú shī yī in Mandarin Chinese.
Literally, 百无失一 means “a hundred without one error”. It is used to mean “to be absolutely infallible”.
百:很多;失:差错。指非常有把握,绝对不会出差错