Acheronian

//ˌækəˈɹəʊ.ni.ən// adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Of or pertaining to Acheron.
Adjective
  1. 1
    dark and dismal as of the rivers Acheron and Styx in Hades wordnet

Etymology

From Acheron + -ian.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.