Dismal, gloomy (6)
I believe the answer is:
dreary
I believe this is a double definition.
'dismal' is the first definition.
(I know that dismal can be written as dreary)
'gloomy' is the second definition.
(I know that gloomy can be written as dreary)
(Other definitions for dreary that I've seen before include "Dark" , "Drab and depressing" , "Banal" , "Monotonous" , "Dismal, funereal" .)