dawca inglês:

She is a blood donor.

Hospitals need donors to give blood for operations.

We urgently need more assistance from donor countries (=countries that give money, food etc to help in poor countries or disaster areas).

... the traditional sort of donor beneficiary weirdness that can...

Japan was the world's largest donor of ODA in 1991.

I had an artificial insemination by donor.

In our country we seldom open gifts in the presence of the giver.

She is a cheerful giver.