noun
heroism
HAIR-oh-iz-um/ˈherəʊɪzəm/
Great courage in facing danger or difficulty.
The lifeguard shows heroism by reaching into choppy water to help the struggling swimmer.

Etymology
The base originally denoted a demigod, but came to mean someone showing exceptional bravery. Heroism names that person's defining quality or conduct: courage in the face of danger or difficulty.
In context
this video focuses on the incredible acts of heroism displayed by German Shepherd dogs highlighting their bravery and life-saving instincts
More examples
- Her heroism during the flood saved three neighbors.
- The medal honors his heroism under enemy fire.
- Treating patients throughout the deadly outbreak required quiet heroism.