crumble [ˈkrʌmbl]

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vi.碎裂，崩溃；vt.弄碎，摧毁

to break , or cause something to break , into small pieces

Opposition more or less crumbled away. 反对势力差不多都瓦解了。
Even if the seas go dry and rocks crumble, my will will remain firm. 纵然海枯石烂，意志永不动摇。