They cracked the nuts and removed their shells...
Once the eggs have hatched the shells are left behind.
I collect shells and interesting seaside items.
She shelled and ate a few nuts.
Her normally shy son had come out of his shell.
...a lonely boy struggling to emerge from his shell.
...the shells of burned buildings...
The solid feel of the car's shell is impressive.
The rebels shelled the densely-populated suburbs near the port.