And for your own sake too, or you are carrying your disinterestedness beyond reason.
In such a situation as that, where there seemed nothing to tempt the avarice or the vanity of any living creature, how could I suppose, when she so earnestly, so warmly insisted on sharing my fate, whatever it might be, that any thing but the most disinterested affection was her inducement?
Of Edward, or at least of some of his concerns, she now received intelligence from Colonel Brandon, who had been into Dorsetshire lately; and who, treating her at once as the disinterested friend of Mr. Ferrars, and the kind of confidant of himself, talked to her a great deal of the parsonage at Delaford, described its deficiencies, and told her what he meant to do himself towards removing them.
There are no more uses of "disinterested" in the book.
Show samples from other sources
All the Finches had straight incisive eyebrows and heavy-lidded eyes; when they looked slant-wise, up, or straight ahead, a disinterested observer would catch a glimpse of what May-comb called Family Resemblance.
Harper Lee -- Go Set a Watchman
He looks up at them, disinterested and maybe disgusted by the baby, because he wanders deeper into the recesses of the cluttered store to get away.