Acheronian
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
dark and dismal as of the rivers Acheron and Styx in Hades
Word Usage
"She had the only light, after all, and I might have wandered those acheronian halls until I collapsed of exhaustion and died of slow starvation."
Equivalent
dark
suggests
Achernar
Athenian
Cameronian
acherontia
anhedonia