gloomy [gloomier, gloomiest](imperfectly illuminated) adjective [UK: ˈɡluː.mi] [US: ˈɡluː.mi]It's a very gloomy day. = Es un día muy sombrío.
grave [graver, gravest](having a sense of seriousness) adjective [UK: ɡreɪv] [US: ˈɡreɪv]
grim [grimmer, grimmest](dismal and gloomy, cold and forbidding) adjective [UK: ɡrɪm] [US: ˈɡrɪm]From the doctor's grim expression, it was clear he had somber news for the patient. = De la expresión siniestra del doctor, estaba claro que tenía noticias sombrías para el paciente.
shadowy(of or pertaining to shadow) adjective [UK: ˈʃæ.dəʊɪ] [US: ˈʃædo.ʊɪ]