Ennui

(noun)

Dissastisfaction and restlessness resulting from boredom or apathy.

A gripping listlessness or melancholia caused by boredom; depression.

Sentence:

“Everything is endured – disgrace, humiliation, poverty, war, crime, ennui – in the belief that overnight something will occur, a miracle, which will render life tolerable.”

-Henry Miller, Tropic of Cancer