hollow out

hollow out  {v.}
To cut or dig out or to cut or dig a hole in; make a cut or cave in; excavate.
The soldier hollowed out a foxhole in the ground to lie in.
The Indians used to hollow out a log to make a canoe.
Joe's father hollowed out a pumpkin to make a jack-o-lantern.
Categories: verb
Source: A Dictionary of American Idioms

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