godan verb (-su), transitive verb
Physical sense: to cut into and break down earth, a slope, or a mountain, often for construction or leveling.
工事で丘を切り崩して道路を通した。
They cut through the hill to build a road.
大雨で斜面が切り崩された。
The slope was cut away by the heavy rain.
godan verb (-su), transitive verb
Figurative sense: to weaken or divide a group, opposition, or strike by gradually reducing its unity or strength.
経営側は組合を切り崩そうとした。
The management tried to split the union.
野党の結束を切り崩す戦略だ。
It's a strategy to break up the opposition party's unity.