drill down

drill down (to something)

to bore downward to something or some distance. We drilled down to a layer of waterbearing sand, hoping to make a well. They had to drill down to bedrock to make a base for the piers that hold the building up.

Common Names:

Name	Pronounced	Usage
Lambert	LAHM-bert (German), LAHM-bərt (Dutch), lam-BER (French), LAM-bərt (English)	German, Dutch, French, English, Ancient Germanic
Rosine	-	French
Aurelius	-	Ancient Roman
Vano	-	Georgian
Amable	-	French (Archaic)
Joash	JO-ash (English)	Biblical