wàn​wú​yī​shī HSK7

surefire

Senses

万无一失/ 萬無一失 wàn​wú​yī​shī (also wàn​wú​yì​shī) surefire

absolutely safe; guaranteed not to fail; describes a situation where there is zero chance of an error occurring

References

synonym 百无一失/百無一失 万无一失/萬無一失
same_as 万全/萬全 万无一失/萬無一失
antonym 百密一疏/百密一疏 万无一失/萬無一失