1. [adj]  (poetic) occurring in the dark or night; "a darkling journey"
2. [adj]  uncannily or threateningly dark or obscure; "a darkling glance"; "secret operatives and darkling conspiracies"-Archibald MacLeish

DARKLING is a 8 letter word that starts with D.

1. \Dark"ling\, adv. [Dark + the adverbial suffix -ling.]
   In the dark. [Poetic]
   
         So, out went the candle, and we were left darkling.
                                                  --Shak.
   
         As the wakeful bird Sings darkling.      --Milton.
   
   

2. \Dark"ling\, p. pr. & a.
   1. Becoming dark or gloomy; frowing.
   
            His honest brows darkling as he looked towards me.
                                                  --Thackeray.
   
   2. Dark; gloomy. ``The darkling precipice.'' --Moore.