Chinese

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ten thousand; a great number; surname not have
one; single; a
one; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)
 
to lose; to miss; to fail
trad. (萬無一失)
simp. (万无一失)

Pronunciation

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Idiom

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萬無一失

  1. infallible; surefire; perfectly safe