This is the 8449th most frequent Japanese word.
憮然
"憮然" means feeling disappointed, dejected, or disheartened.
The word '憮然' is used here to describe a state of being disheartened or disappointed by unexpected or upsetting news.
彼は突然の知らせに憮然としていた。
He was disheartened by the sudden news.
In this context, '憮然' refers to the feeling of dispiritedness or disappointment following an unsuccessful outcome.
彼女は計画が失敗し憮然となった。
She was crestfallen when the plan failed.
Here, '憮然' is used to indicate a physical expression of bewilderment or disappointment in reaction to an opinion.