Webster's Revised Unabridged Dictionary · 1913

Disapprove

Disapprove , transitive verb

[Prefix dis- + approve: compare French déapprouver. Compare Disapprobation.]

1.
To pass unfavorable judgment upon; to condemn by an act of the judgment; to regard as wrong, unsuitable, or inexpedient; to censure; as, to disapprove the conduct of others.
2.
To refuse official approbation to; to disallow; to decline to sanction; as, the sentence of the court-martial was disapproved by the commander in chief.

This verb is often followed by of; as, to disapprove of an opinion, of such conduct. See Approve.