Definition & Meaning of "at one's wit's end"

What is the origin of the idiom "at one's wit's end" and when to use it?

The idiom "at one's wit's end" is used to describe a state of extreme frustration, confusion, or helplessness when someone has exhausted all their resources, ideas, or patience in dealing with a difficult situation or problem. It is often used in situations where individuals feel overwhelmed and unable to find a solution or way forward. This expression implies a feeling of being completely stuck or at a loss for what to do next. It can be used in various contexts, such as personal challenges, professional dilemmas, or even in parenting when dealing with a particularly difficult child.