lugubriousness       
noun [ U ]  literary uk/luːˈɡuː.bri.əs.nəs/ us/luːˈɡuː.bri.əs.nəs/
 阴郁
the quality of being sad and serious
  The news was read with great lugubriousness. 这条新闻读来颇为悲惨。 
 The music had an air of lugubriousness. 音乐有一种悲壮的气氛。 
 See: lugubrious
 - More examples
 - His storytelling acquired an all-purpose lugubriousness.
 - The strong ending cannot quite the redeem the lugubriousness of the book.
 - There was apparently little reason for her lugubriousness.