darkest

adjective

1. 1

   Having an absolute or (more often) relative lack of light.

   “The room was too dark for reading.”

2. 2

   (of colour) Dull or deeper in hue; not bright or light.

   “my sister's hair is darker than mine;  her skin grew dark with a suntan”

3. 3

   Hidden, secret, obscure.

4. 4

   Without moral or spiritual light; sinister, malign.

   “a dark villain;  a dark deed”

5. 5

   Conducive to hopelessness; depressing or bleak.

   “the Great Depression was a dark time;  the film was a dark psychological thriller”

6. 6

   Lacking progress in science or the arts; said of a time period.

7. 7

   With emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction presented in narrative form or a portion of either.

   “The ending of this book is rather dark.”