ennui
noun [ U ] literary uk/ˌɒnˈwiː/ us/ˌɑːnˈwiː/
（由于无所事事而感到的）无聊，厌倦，倦怠
a feeling of being bored and mentally tired caused by having nothing interesting or exciting to do
The whole country seems to be affected by the ennui of winter. 冬天的倦怠似乎影响着整个国家。
Synonyms: boredomtedium