"Mettlesome" is an adjective derived from the word mettle, meaning courage, spirit, or resilience. It describes someone or something that is full of energy, determination, and a strong sense of resolve. A mettlesome person is characterized by their bravery, enthusiasm, and the ability to confront challenges with vigor and perseverance. The term is often used to highlight someone�s spirited and adventurous nature, especially when faced with difficulties.

The word evokes an image of someone who is ready to face adversity head-on with a bold and dynamic attitude.