v.崩溃；弄碎；破灭
The masonry of the old building began to crumble. 旧楼房的砖石结构开始崩落。
He crumbled the bread in his fingers. 他用手指把面包捏碎了。
Even these hard parts may crumble to dust. 甚至这些坚硬的部分也会破成碎粉末。
His dearest hopes crumbled to nothing. 他最大的希成了泡影。
