petardo
firecracker
pet
animal companion
+
ardo
burn (from 'arder')
Petardo means firecracker. Think of it as a pet0 that goes ardo1 (burn1), like a small explosive companion.
noun
- firecrackerA small explosive device used for making noise, especially in celebrationsLos niños lanzaron petardos durante la fiesta de Año Nuevo. // The children set off firecrackers during the New Year's party.