pán​gēn​jiū​dǐ

to get to the bottom of something

Senses

盘根究底/ 盤根究底 pán​gēn​jiū​dǐ (also pán​gēn​jiù​dǐ) to get to the bottom of something

to examine the roots and inquire at the base; to probe into the heart of a matter or investigate something thoroughly

References

variant 盘根问底/盤根問底 盘根究底/盤根究底