She crumbled a biscuit.

Dan crumbled the sandwich and threw it to the floor.

Where did you crumble them?

I crumbled one.

Time crumbles things; everything grows old under the power of Time and is forgotten through the lapse of Time.

Sami's world crumbled.

The church we went past crumbled five minutes afterwards due to a huge earthquake and more than a 100 churchgoers were buried alive.

Sami crumbled to the floor.

Everything crumbles as soon as I touch it.

Phew! It hurts me to see my identity crumble.