ennui
US /ˌɑːnˈwiː/
UK /ˌɑːnˈwiː/

1.
kebosanan, kejenuhan, kelesuan
a feeling of listlessness and dissatisfaction arising from a lack of occupation or excitement; boredom.
:
•
The endless lectures filled him with ennui.
Kuliah yang tak ada habisnya membuatnya merasa bosan.
•
She suffered from a deep sense of ennui during her long illness.
Dia menderita rasa bosan yang mendalam selama sakitnya yang panjang.