Read Edit View history 所以然 suǒyǐrán rationale Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 所以然 · suǒyǐrán · rationale 2026/03/04 所以然 suǒyǐrán rationale the reason why 他说不出个所以然来。 idiom created sense Mar 4, 2026, 02:25 AM