This is the 10636th most frequent Spanish word.
cáscara
The outer shell or peel of a fruit, nut, or egg.
Here, 'cáscara' is used metaphorically to describe the protective outer layer of a living organism.
El caracol lleva su casa en su cáscara.
The snail carries its home in its shell.
Here, 'cáscara' refers to the outer, often edible, protective layer of a fruit or similar food.
La cáscara de la manzana es rica en fibra.
The apple's peel is rich in fiber.
In this sentence, 'cáscara' denotes the hard outer covering of an egg, which is inedible.