From Longman Dictionary of Contemporary Englishennuien‧nui /ɒnˈwiː $ ɑːn-/ noun [uncountable] formalBORING a feeling of being tired, bored, and unsatisfied with your life
Examples from the Corpus
ennui• Apparently, sophistication and ennui can be easily applied with a brush.• She swam slowly out into the sea, waiting for the ghastly ennui to pass.• She asks what she can do to dispel her ennui, and he advises that she concern herself with matters outside herself.• When they fail to do this, ennui is not far behind.• Were it not fur her, I dare say Edward Plantagenet would long since have succumbed to ennui and despair.• The Dream Teamers, as individuals, are not bogged down with ennui.• Joseph is a disgruntled Brooklyn teenager who, when he doesn't get into Columbia, fills up with ennui.Origin ennui (1700-1800) French Old French enuier; → ANNOY 