darkling

Short definition from Wiktionary

Adverb

1. 1
   In the dark; in obscurity.

Adjective

1. 1
   Dark; growing dark; darkening.
2. 2
   Obscure; taking place unseen, as if in the dark.

Noun

1. 1
   Darkness.
2. 2
   A child of darkness; someone dark by nature or who has grown dark in character.
3. 3
   A creature that lives in the dark.
4. 4
   A demon.

Verb

1. 1
   present participle and gerund of darkle