godan verb (-su), transitive verb
empty out; drain out; pump dry
Used for removing all liquid from a container or source by scooping, ladling, or pumping. Often implies thoroughness.
井戸の水を汲み干す。
I drain the well dry.
船底にたまった水を汲み干した。
We bailed out all the water that had collected in the bottom of the boat.