Disinterested :: Disinterested (a.) Not influenced by regard to personal interest or advantage; free from selfish motive; having no relation of interest or feeling; not biased or prejudiced; as, a disinterested decision or judge..
Disinterestedly :: Disinterestedly (adv.) In a disinterested manner; without bias or prejudice.
Disinterestedness :: Disinterestedness (n.) The state or quality of being disinterested; impartiality.