The word "unreasoning" refers to something that lacks rationale or logic. Its antonyms are words that convey the opposite meaning. The antonyms of unreasoning are logical, sensible, intellectual, reasonable, and judicious. The word logical connotes the presence of sound reasoning and clear thinking. Sensible refers to something that is practical and reasonable. Intellectual implies the exercise of reasoning and mental capacity. Reasonable connotes the presence of a sound basis for an argument. Judicious refers to a wise and sensible decision-making process, based on good judgment. By using these antonyms in our vocabulary, we can create a more articulate and nuanced expression of our ideas and thoughts.