disengage, free - free or remove obstruction from; "free a path across the cluttered floor"

core out, hollow out, hollow - remove the interior of; "hollow out a tree trunk"

lift - take (root crops) out of the ground; "lift potatoes"

trench - dig a trench or trenches; "The National Guardsmen were sent out to trench"

dibble - make a hole with a wooden hand tool; "dibble the ground"