Gloomy, mournful, or suggestive of a funeral; having a dark or somber quality.
From French 'funèbre' and Latin 'funebris' (relating to funerals). Both derive from 'funus' (funeral, death).
This is a classier way to say 'gloomy'—a funebre atmosphere has that specific heavy, mournful feeling rather than just being dark.
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