The antonym for cautious is reckless. To determine antonyms, you can use a thesaurus or online tools dedicated to finding word opposites. For instance, you can search for "antonym of cautious" or "opposite of cautious" in a search engine, and various resources will provide you with words like reckless, bold, careless, or impulsive. It's always a good practice to consult trusted sources to confirm the antonym.
