Most dismissive is a phrase used to describe someone who is highly uninterested or unsympathetic towards a particular situation or idea. The opposite of most dismissive would be someone who is highly interested and invested in the same situation or idea. The antonyms for most dismissive can be enthusiastic, attentive, caring, receptive, open-minded, engaged, concerned, and empathetic. These antonyms describe individuals who take a keen interest in all aspects of the topic at hand, showing interest and empathy towards others' opinions and feelings. Such individuals take time to listen, understand other perspectives, and value the opinions of others. In contrast, those who are most dismissive are generally seen as self-centered, ignorant, and apathetic towards others.