Select the most appropriate antonym of the given word.

Approve

Reject

The most appropriate antonym of the word approve is reject.

• Approve means "to give formal consent to something; to sanction."
• Reject means "to refuse to accept or consider something; to turn down."

The other words do not have the same meaning as approve, so they are not its antonyms.

• Agree means "to have the same opinion or view as someone else; to concur."
• Appeal means "to make a formal request for something; to ask for something."
• Confirm means "to make something certain or definite; to uphold or ratify."