What are the opposite words for irrational?

The term "irrational" implies a lack of reason or logic. In contrast, an antonym, "rational," suggests a thoughtful and logical approach or decision-making process. Another antonym could be "sensible," which refers to behaviour or actions that are grounded in sound judgement or practicality. "Thoughtful" is another antonym, which relates to the process of considering one's thoughts and feelings before making a decision. "Sane" is also an antonym, indicating that a person is mentally sound and is therefore making rational, right-minded choices. Finally, "reasonable" is an antonym because it implies that decisions are based on logic and are consistent with common sense.