Webster's Revised Unabridged Dictionary · 1913

Disprove

Disprove , transitive verb

[Prefix dis- + prove: compare Old French desprover.]

1.
To prove to be false or erroneous; to confute; to refute.
That false supposition I advanced in order to disprove it. — Atterbury
2.
To disallow; to disapprove of. [Obsolete] — Stirling