The word "un-evolved" implies a lack of progress or growth. Some antonyms for this word include "developed," "mature," "evolving," "improving," and "progressing." These words suggest a forward movement towards expansion, advancement, and evolution. "Developed" implies that something has reached a higher level of sophistication or complexity, while "mature" suggests a full development or growth. "Evolving" denotes a continuous change over time, while "improving" implies an ongoing process of refinement or enhancement. Finally, "progressing" tells us that things are moving forward towards a positive outcome. All of these antonyms demonstrate the opposite of un-evolved, and describe a state of advancement, growth, and progress.