Webster's Revised Unabridged Dictionary · 1913

Disinterest

Disinterest , past participle (adjectival)

Disinterested. [Obsolete]
The measures they shall walk by shall be disinterest and even. — Jer. Taylor

Disinterest , noun

1.
What is contrary to interest or advantage; disadvantage. [Obsolete] — Glanvill
2.
Indifference to profit; want of regard to private advantage; disinterestedness. [Obsolete] — Johnson

Disinterest , transitive verb

To divest of interest or interested motives. [Obsolete] — Feltham