hollow out

delve

excavate tunnel undermine

scoop out

cover fill

erode frustrate hurt impair ruin sabotage sap subvert threaten thwart torpedo undercut weaken wreck

attenuate corrode cripple debilitate dig disable enfeeble excavate foil mine sandbag soften tunnel wear

clip one's wings dig out eat away knock the bottom out of poke full of holes whittle away

aid assist build construct encourage fix help relieve strengthen support

fill