Unconquerable (adjective)

Impossible to defeat or overcome.

Origin:

From un- ("not") + conquerable ("able to be conquere.d")

Examples:

1. Despite their best efforts, the enemy was unconquerable.
2. The unconquerable mountain stood tall and proud.
3. His unconquerable spirit kept him going through the toughest of times.
4. The unconquerable disease took the lives of many.
5. Their love was unconquerable, even in the face of adversity.