Unselfishly

[,ʌn'sɛlfɪʃli]

(adv.) in an unselfish manner; 'he acted unselfishly when he helped her get the promotion'.

Typed by Gilda--From WordNet

Herein, too, the sense of even thinking unselfishly aided him. Charles Dickens. Hard Times.
It was good of you, dear Newland, to devote yourself so unselfishly to Madame Olenska. Edith Wharton. The Age of Innocence.

Typed by Gilda