Enhancing one's physical appearance has been a common desire among people worldwide. However, finding the right word to express this desire can sometimes be challenging. Instead of using the term "improve in looks," you might consider alternatives like "enhance," which indicates a subtle and gradual improvement in appearance. "Groom" could also be used to describe an individual's neatness, tidiness, and sleek appearance. "Polish" and "refine" are also great synonyms for "improve in looks," indicating a classy and sophisticated look. "Upgrade" is another option that suggests a higher level of quality than before. In summary, using any of these words to describe one's quest for a better look will communicate the message perfectly.