The word "un-physical" refers to something that is not related to the physical realm, such as thoughts or emotions. Its antonyms are "physical" and "tangible," which imply that something has a physical presence or can be touched, seen or heard. Other possible antonyms include "material," "substantial," "corporeal," and "concrete." Each of these words suggests a quality that is opposite to the intangible nature of "un-physical." For instance, "material" implies something that has substance or matter, while "concrete" indicates a solid and definite existence. In general, antonyms for "un-physical" highlight the contrast between abstract concepts and concrete reality.