The opposite of un-mindful is mindful, which means being fully present and attentive in the moment. Other antonyms for un-mindful include observant, conscious, aware, cognizant, attentive, alert, and mindful. These words imply being focused on the present moment and noticing details in one's surroundings. Mindfulness is a skill that can be developed through meditation and other practices, and it has been shown to have numerous benefits for mental and physical health. By practicing mindfulness, individuals can improve their ability to focus, reduce stress and anxiety, and enhance their overall well-being.