Self-sacrifice (noun)

The act of giving up something valuable for the benefit of others, often at a personal cost.

Origin:

Combination of self and sacrifice, meaning the act of giving up something valuable for the benefit of others.

Examples:

1. The soldier made the ultimate self-sacrifice to save his comrades.
2. Her self-sacrifice for her family was admirable.
3. The firefighter's self-sacrifice saved the lives of many.
4. He made the self-sacrifice to give up his career for his family.
5. She was praised for her self-sacrifice in donating all her earnings to charity.