(cause to) break into very small pieces
weaken; decay; become ruined
"the building crumbled after the explosion"
"Negotiations broke down"
"The cookies crumbled"
"The Sphinx is crumbling"
"The unoccupied house started to decay"
Marbles with their deepest inscriptions crumble away.
The termites live on the Joshua tree,..crumbling the fortress from within.
出自： D. C. Peattie
My father did not crumble at my mother's death.
出自： G. Swift