Question

how to use ennui in sentence??

Answer 1

Enuui means feeling bored or depressed by someone or something. So it expresses that you are bored of something, so you can use it in sentences where you want to express a person's boredom. For example, Tom dropped out due to his academic enuui. Hope this helps!!

Answer 2

First of all, what actually ennui means?
Actually it is the feeling of being bored by something tedious..

Now, lets come to the sentence part, 
Sentence- The young fellows are suffering from ennui.  

Hope this helps...!!