blood donor

Translations
донор крови
Someone became a blood donor to help save lives.
Кто-то стал донором крови, чтобы помочь спасти жизни.
Definitions
A blood donor is an individual who voluntarily gives their blood for transfusion to others in need, typically to help patients undergoing surgery, suffering from medical conditions, or in emergencies.
Words
blood

noun
кровь
donor

noun
донор