尋根究底 (cam4 gan1 gau3 dai2) — inquire deeply into in Cantonese
camˎ₄尋ganˉ¹根gau˗₃究daiˊ²底简 寻根究底
Mandarin Pinyin: xun2 gen1 jiu1 di3
Meaning of 尋根究底
nouninquire deeply into
nounverb; to make a thorough investigation, to search or get to the root of thing, to inquire deeply into