The antonyms for clear-headed include muddled, confused, befuddled, addled, hazy, cloudy, and foggy. These terms refer to a lack of mental clarity or focus, and can indicate a state of disorientation or uncertainty. Unlike the positive connotations of clear-headedness, these words suggest a sense of confusion or mental fog that can interfere with decision-making, problem-solving, or effective communication. When faced with complex or challenging situations, it can be difficult to maintain a clear-headed mindset, and it may be necessary to take a step back and refocus in order to regain clarity and perspective.