The word "un-advised" means doing something without seeking or considering advice or recommendations. Therefore, the antonyms or opposite words to "un-advised" would be closely related to seeking advice or recommendations. Some possible antonyms to "un-advised" include "advised," "informed," "counseled," "guided," "directed," "instructed," "suggested," or "recommended." The use of these antonyms suggests that the person is cautious, thoughtful, or prudent in the decisions they make. Seeking advice from knowledgeable sources can help to avoid potential pitfalls and make more informed decisions. Therefore, it is always wise to seek advice from others before making major life-changing decisions.