avernal
[adjective]
Synonyms: infernal, cimmerian, hellish, pandemoniac, plutonian, plutonic, stygian

[TahlilGaran] English Synonym Dictionary ▲

Avernal adjective. [ǝ'vǝ:n(ǝ)l] L16.
[Latin avernalis, from avernus (lacus) = Greek aornos (limnē) birdless (lake), from A-¹⁰ + ornis bird: see -AL¹.]
Of the nature of or pertaining to Avernus, a lake in Campania, Italy, the effluvium from which was anciently said to kill overflying birds; gen. infernal, devilish.

[TahlilGaran] English Dictionary ▲