大不韪 dàbùwěi great error Origin Definitions Defs Strokes Stroke Words Sentences Sents 大 dà adjective big big; large; great; vast; high in scale or intensity; (of a person) old; adult不韪 不韙 bùwěi fault (literary) a fault or error; a wrongdoing; used almost exclusively in the idiom 冒天下之大不韪 màotiānxiàzhīdàbùwěi