The antonyms for the word "are watchful" could be "unobservant" or "careless." These terms refer to a lack of attention or focus, indicating an absence of concern or vigilance. When someone is unobservant, they may fail to notice important details or potential dangers in their environment, putting themselves or others in harm's way. Conversely, those who are careless may not take proper precautions or exercise due diligence when carrying out tasks, risking injury or other negative consequences. In contrast, being watchful implies being attentive, aware, and prepared, making it an essential quality in many situations, such as driving, parenting, and navigating unfamiliar territory.