scrunch [intransitive] informal
if stones, leaves etc scrunch as you walk on them, they make a noisy sound:
The dry leaves scrunched under our feet.
—scrunch noun [singular]
the scrunch of gravel
scrunch something ↔ upphrasal verb
to crush and twist something into a small round shape:
I scrunched up the letter and threw it in the bin.
to move the muscles in your face in a way that makes your eyes seem narrow:
He scrunched up his eyes and grinned.