Indomitable (adjective)

Impossible to subdue or defeat; unyielding and determined.

Origin:

Late 16th century: from in- "not" + latin domitare "to subdue".

Examples:

1. She had an indomitable spirit and refused to give up.
2. The team showed indomitable will and fought until the end.
3. The indomitable determination of the hero inspired the people.
4. The indomitable courage of the soldiers was unmatched.
5. The indomitable resolve of the people led to the eventual victory.