The antonyms for the word "more naive" are "less naive," "sophisticated," "worldly," "experienced," "knowing," "practical," "sensible," "astute," "wise," and "savvy." While being naive implies a lack of knowledge or experience, these antonyms suggest a greater level of awareness and understanding. Someone who is less naive is less likely to be easily deceived or misled, and more likely to approach things with a critical eye. Being sophisticated and worldly implies being familiar with different cultures and ways of thinking, while being experienced suggests having personal or professional knowledge in a certain area. Being savvy and astute imply the possession of practical skills and a shrewdness that comes with experience.