cáscara

bark from a bush or tree; any similar outer layer, as the peel of a fruit, the rind of a melon, or the shell of an egg or nut, husk of a coconut

“La cáscara de este árbol era utilizada para hacer tangas.” — The bark of this tree was used to make thongs.

From Vulgar Latin reconstructed as *quassicāre (“to strike repeatedly”), from Latin quassāre (“to tremor; to cause to tremor by repeated strikes”) + -icō (suffix indicating frequent or repetitive action), from quatiō (“to shake”) + -tō (suffix indicating frequent or repetitive action). First applied to bark and peels from the manner of their removal. Cognate with English cask and Portuguese casca.