This word is from the Spanish Averno.
A·bér·no
Abérno
Avernus
Avernus was an ancient name for a volcanic crater near Cumae (Cuma), Italy, in the region of Campania west of Naples.
Avernus was believed to be the entrance to the underworld, and is portrayed as such in the Aeneid of Virgil.
According to tradition, all birds flying over the lake were destined to fall dead, hence the lake’s name was transferred to Greek as Ἄορνος (λίμνη) Áornos (límnē)‚ or “Birdless (lake)”. This was likely due to the toxic fumes that mouths of the crater gave off into the atmosphere. In later times, the word was simply an alternate name for the underworld.
KAHULUGAN SA TAGALOG
Abérno: sa mga Griyego at Romano, pook na katulad ng impiyerno
Abernong… sinapupunan ng mga patay; hantungan ng mga sumasakabilang buhay.

