to excavate; to explore; (fig.) to unearth; to tap into

to dig

to dig; to excavate; (fig.) to explore (archival materials) and unearth findings

to scrape together money (abbr. for 羅雀掘鼠|罗雀掘鼠[luo2 que4 jue2 shu3])

to excavate; to extract (ore)