to curl up or huddle one's body, often for warmth or comfort

twisted, coiled, or bent into a curved shape, often describing hair, leaves, or a body posture

to curl up, huddle up, or lie with one's knees drawn up to the chest

to lie or rest with the body curled into a ball

to curl up, huddle, or lie in a coiled position

progress that seems like retreat; advancement appearing as regression