Select the most appropriate ANTONYM for the given word.
Rational

Illogical

The most appropriate antonym for the word rational is illogical.

• Rational means based on or in accordance with reason or logic.
• Illogical means not based on or in accordance with reason or logic.

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

• Calm means not showing or feeling any excitement or disturbance.
• Renounce means to give up or reject something.
• Obscures means to make something unclear or difficult to understand.