Hanzi
万不一失
万不一失
万不一失
万不一失
万不一失
万不一失
万不一失
万不一失
万不一失
万不一失

wàn万bù不yī一shī失

absolutely safe and reliable; foolproof; leaving no room for error

工程师们对设计图进行了多次校对，确保方案万不一失
The engineers proofread the design drawings multiple times to ensure the plan was absolutely foolproof.

Era:

Ancient

Frequency:

Synonym:

万不失一、万无一失

Next Idiom