Meaning of the word "to no purpose" in English

What does "to no purpose" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

to no purpose

US /tə noʊ ˈpɜːrpəs/
UK /tə nəʊ ˈpɜːpəs/

Phrase

without success or a useful result; in vain

Example:
All his efforts were to no purpose.
We tried to convince him, but it was all to no purpose.