vt.

1. 粉碎，弄碎
   She crumbled an empty snail shell in her fingers.

   她用手指捏碎了一个空蜗牛壳。

2. 摧毁，破坏
   The recent earthquake crumbled the walls of many houses.

   最近一次地震震坍了许多房子的墙。

vi.

1. 破碎，碎裂
   This bread crumbles ever so easily.

   这种面包非常容易碎。

2. 崩溃，灭亡，消失
   In the end, the Roman Empire crumbled.

   最终，罗马帝国崩溃了。

v.

▸disintegrate gradually:

the party's fragile unity began to crumble.

n.