Crossword Clue:

DRUMLY gloomy dismally dark

AnswerCrossword Clue
DUNDark; gloomy
SOMBERDark and gloomy
DISMALDark and gloomy
STYGIANDark and gloomy
DREARDark and gloomy
MURKSMakes dark and gloomy
OVERSHADEMake dark or gloomy.
RAYLESSDark and gloomy, as a cave