What do overconfidence and temerity and dismay and brashness means and what word is not related?

Overconfidence refers to an excessive belief in one's abilities or judgments, while temerity denotes a reckless boldness or audacity. Dismay indicates a state of distress or disappointment, and brashness describes a lack of sensitivity or tact, often resulting in impudent behavior. Among these, dismay is the Word that is not related, as it conveys a negative emotional response rather than a quality of boldness or confidence.