What is to no avail?

The phrase "to no avail" is an idiomatic expression used in English that means without success or without achieving the desired results. It signifies that efforts have been made, but they have not led to any fruitful outcome. For example, one might say, "She tried to fix the problem, but to no avail," indicating that the issue remains unresolved despite her attempts. The phrase is often used to convey a sense of frustration or disappointment over the ineffectiveness of an action or effort.