to hollow out or form (something) by removing earthworkmen are excavating a long tunnel that will eventually replace the aboveground expressway
workmen are excavating a long tunnel that will eventually replace the aboveground expressway
dug, shoveled(or shovelled)
dredgedburrowed, clawed, grubbeddug inscooped, spadeddelvedmined, quarried
filled (in)smoothed (out or over)
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