Read Edit View history 不得而知 bùdé'érzhī HSK7 unknown Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 不得而知 · bùdé'érzhī · unknown 2026/03/04 不得而知 bùdé'érzhī unknown impossible to know or find out for certain 他的真实动机，我们至今仍不得而知。 expression created sense Mar 4, 2026, 02:25 AM