Definition of Acherontic in English:

Acherontic

adjective

literary
  • Of or relating to Acheron; infernal, hellish; dark, gloomy.

Origin

Late 16th century; earliest use found in Thomas Middleton (d. 1627), playwright. From post-classical Latin acheronticus of or belonging to Acheron or the underworld from classical Latin Acheront-, Acherōn + -icus.

Pronunciation:

Acherontic

/ak(ə)ˈrɒntɪk/