Trying to convince him to change his mind is a lost cause
The team was down by 30 points in the last quarter; it was a lost cause
She realized her attempts to apologize were a lost cause after he refused to speak to her
We tried to save the old building, but it was a lost cause due to the extensive damage
He knew that arguing with his stubborn aunt would be a lost cause
The company's financial situation had deteriorated so much that its recovery was considered a lost cause
She felt that her dream of becoming a famous musician was a lost cause when she failed to get into music school
He saw the company's current marketing strategy as a lost cause and suggested a complete overhaul
Don't waste your energy on him; he's a lost cause when it comes to tidiness
The ancient manuscript was in such a fragile state that its preservation was a lost cause
I think this project is a lost cause now.
Don't say that, we can still try to fix it.
I really don't see a way forward anymore.
Trying to convince him was a lost cause
Persuasion was impossible; he wouldn't change his mind
He was unreachable; further attempts were futile