sombre          
adjective UK (US somber) uk/ˈsɒm.bər/ us/ˈsɑːm.bɚ/
 严肃的;忧郁的
serious, sad, and without humour or entertainment
  a sombre atmosphere/voice/face 严肃的气氛/声音/脸 
 The funeral was a sombre occasion. 葬礼是严肃的场合。 
 I left them in a sombre mood. 我满心忧郁地离开了他们。 
  暗淡的,深色的
dark and plain
  He wore a sombre black suit. 他穿着一套深黑色套装。