acurrucar

to huddle, to curl up (because of the cold); to snuggle, to spoon; to make somebody squat; to squat

“Los dos se acurrucaron en la cama.” — Both of them snuggled on the bed.

Probably back-formed from Old Spanish acorrucado, from a- + Latin corrūgātus (“wrinked”), perfect passive participle of corrūgō (“to wrinkle”). Compare English corrugate.