ㄨㄢˋwànㄑㄩㄢˊquán

  1. 萬無一失絕對安全漢書··黥布》:天下可以萬全。」

Wanquan county in Zhangjiakou 張家口[Zhang1 jia1 kou3], Hebei, absolutely safe, surefire, thorough
absolument sûr, de toute sûreté, infaillible
Wanquan (Ort in Hebei, China)​ (Eig, Geo)​