The antonyms for the word "more unconcentrated" could be "more focused," "more concentrated," or "more attentive." These words reflect a sense of alertness, purpose, and directed attention, which are the opposite of being scattered, distracted, or unfocused. Other possible antonyms for "more unconcentrated" might include "more intent," "more fixated," or "more absorbed," all of which convey a sense of deep engagement with a task or object of attention. By contrast, "more unconcentrated" suggests a lack of clarity or direction, a lack of motivation or interest, or a lack of commitment to the task at hand.