The word "disregardful" means lacking respect or attention. The antonyms of this term would be respectful, considerate, attentive, dutiful, observant, mindful, and vigilant. When we say someone is respectful, it means they have high regard for others and show them decency and kindness. Those who are considerate are thoughtful and take other people's feelings and needs into account. Someone who is attentive is focused and concerned about important matters. A dutiful person is one who fulfills their obligations and responsibilities with diligence. Observant individuals have heightened perception and awareness. Someone who is mindful is aware and conscious of their thoughts, actions, and surroundings. Lastly, a vigilant person is watchful and alert to potential dangers.