The term "indomitable" describes a spirit that is:

The term "indomitable" is used to characterize a spirit that is unable to be subdued or overcome. This word conveys resilience, strength, and an enduring nature, implying that no matter the challenges or adversities faced, this spirit remains unyielding and strong. It reflects a quality of determination and perseverance, suggesting that the individual or entity maintains a courageous attitude that cannot be defeated or diminished by external forces.

In a broader sense, the concept of an indomitable spirit is often associated with individuals who display unwavering courage in the face of difficulty, making it an exemplary trait in various contexts such as sports, personal challenges, or historical narratives. Thus, this understanding aligns perfectly with the definition of "indomitable," highlighting the robustness of the spirit it describes.