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 exhume; to unearth; to dig out

Digg (social news website)

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

to excavate; to extract (ore)

excavator; excavating machine

excavator

lit. not to dig a well until one is thirsty; to be unprepared and seek help at the last minute (idiom)

excavator; bulldozer

grave digger

to exhume a body for public flogging (idiom)

data mining

(lit.) to net sparrows and dig out rats (idiom); (fig.) to try every possible means of obtaining food (in times of starvation)

to dig one's own grave

Drinking the water of a well, one should never forget who dug it. (idiom)