From Wiktionary, the free dictionary
From zuna + -iegu.
zuniegu m sg (feminine singular zuniega, neuter singular zuniego, masculine plural zuniegos, feminine plural zuniegues)
- with vices, manias, badly accustomed (an animal, a person)
- “zuniegu” in Diccionario general de la lengua asturiana. Xosé Lluis García Arias. →ISBN.