Select the most appropriate antonym of the given word.

PERTURB

Soothe

The most appropriate antonym of the word "perturb" is soothe.

• Perturb means "to disturb the peace or calm of (someone or something); to make (someone) feel anxious or unsettled."
• Soothe means "to make (someone or something) feel calmer or more relaxed."

The other words do not have the opposite meaning of "perturb."

• Confound means "to confuse or puzzle (someone)."
• Commend means "to praise or express approval of (someone or something)."
• Fluster means "to make (someone) feel confused, anxious, or disconcerted."