Senses
上穷碧落下黄泉/ 上窮碧落下黃泉 to search everywhere
To search up into the highest heavens and down into the deepest underworld; to leave no stone unturned in an exhaustive search. From a line in the Tang dynasty poem "Song of Everlasting Regret" by Bai Juyi.
References
No references for this word.