追根溯源

to pursue sth back to its origins / to trace back to the source / to get to the bottom of sth

to sculpt / to carve / musical instrument (old)

to chase / to pursue / to look into / to investigate / to reminisce / to recall / to court (one's beloved) / to binge-watch (a TV drama) / retroactively / posthumously

to trace sth back to its source / to get to the bottom of sth

root / basis / classifier for long slender objects, e.g. cigarettes, guitar strings / CL:條|条[tiao2] / radical (chemistry)

to go upstream / to trace the source

variant of 溯[su4]

to investigate the origin of sth / to trace a river upstream back to its source

root / source / origin