Altruist: let me help you

when you care about or help other people, even though this brings no advantage to yourself

You have discovered the secret of true happiness—concerning yourself with the welfare of others. Never mind your- own inter-ests, how's the next fellow getting along?

altruism n. 利他主义，无私
altruist n. 利他主义者, 无私者
altruistic adj. 利他主义的，无私的