underworld

/AH1 N D ER0 W ER0 L D/
noun
  1. 1

    The world of the dead, located underneath the world of the living; the afterlife.

  2. 2

    That part of society that is engaged in crime or vice.

  3. 3

    The portion of a game that is set below ground.

Synonyms

Antonyms

Source: https://en.wiktionary.org/wiki/underworld