Daily Chinese Idiom Wordle Game
万无一失 (wàn wú yī shī)
Absolutely certain, no risk of error or failure.
Literal: ten thousand not one loss
We checked the plan twice to make sure it was foolproof and wàn wú yī shī.
Think about a situation where you want complete assurance.
The second character means 'without' and the fourth means 'loss'.