noun, masculine/eˈɾiθo/plural: erizos
hedgehog (mammal of the subfamily Erinaceinae); ellipsis of erizo de mar (“sea urchin”, literally “sea hedgehog”)
“El lomo del erizo es espinoso.” — The hedgehog's back is spiny.
Inherited from Latin ēricius (“hedgehog”), from Proto-Indo-European *ǵʰḗr (“to bristle”). Compare English urchin.