究其根源 jiūqígēnyuán to trace something to its source Origin Definitions Defs Strokes Stroke Words Sentences Sents 究 jiū nounverb to investigate (bound form) to study carefully; to probe; to research其 qí pronoun [third-person possessive] his; her; its; their; refers back to a person or thing mentioned previously根源 gēnyuán to trace back (literary) to trace something back to its source or origin