carapace

car + space....where do you have space in the car, at the back which is always covered...so the meaning is a shell covering the back.

CARRY-PACE - the PACE of the turtule (animal with a hard shell) is slow because it has to CARRY its HARD SHELL

kada + peeth which means "hard back"

The hard outer covering (CARAPACE) of billiard balls is what allows them to CAROM off of one another.

carapace - a carapace is meant to care for the base