Select the most appropriate ANTONYM of the given word.

Rational

Illogical

The most appropriate antonym of the word "rational" is illogical.

• Rational means "based on or in accordance with reason or logic."
• Illogical means "not logical; not in accordance with reason or sound judgment."

The other words do not have the same meaning as "rational" and are therefore not antonyms.

• Polite means "having or showing good manners and courtesy."
• Conscious means "aware of and responsive to one's surroundings."
• Impatient means "unable or unwilling to wait patiently."