Read Edit View history 万无一失 wànwúyīshī HSK7 surefire Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 万无一失/萬無一失 · wànwúyīshī · surefire 2026/03/04 万无一失 / 萬無一失 wànwúyīshī surefire absolutely safe; foolproof; no risk of failure 为了确保计划万无一失，我们必须仔细检查每一个细节。 idiom created sense Mar 4, 2026, 02:25 AM