Meaning of the word "to no avail" in English

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

to no avail

US /tə noʊ əˈveɪl/
UK /tə noʊ əˈveɪl/

Idiom

without success; uselessly

Example:
They tried to fix the old car, but to no avail.
She pleaded with him to no avail; he still left.