murkiest

adjective
  1. 1

    Hard to see through, as a fog or mist.

  2. 2

    Dark, dim, gloomy.

  3. 3

    Cloudy, indistinct, obscure.

  4. 4

    Dishonest, shady.

Synonyms

Source: https://en.wiktionary.org/wiki/murkiest, https://en.wiktionary.org/wiki/murky