Select the most appropriate ANTONYM of the given word.

Appal

Assure

The most appropriate antonym of the word appal is assure.

• Appall means to fill with dismay or horror.
• Assure means to make certain or confident.

The word appal means to fill with dismay or horror, while the word assure means to make certain or confident. Therefore, the antonym of appal is assure.

The other options are not antonyms of appal.

• Alarm means to cause fear or anxiety.
• Amaze means to fill with wonder or surprise.
• Astound means to overwhelm with surprise or shock.