Akademik

sombre

adj. (also US somber)
1 dark, gloomy (a sombre sky).
2 oppressively solemn or sober.
3 dismal, foreboding (a sombre prospect).
Derivatives:
sombrely adv. sombreness n.
Etymology: F sombre f. OF sombre (n.) ult. f. L SUB- + umbra shade

Useful english dictionary. 2012.