The phrase "brought a close" implies the ending of something, and its antonyms suggest the continuation or extension of that something. Words like "opened up," "started anew," and "commenced" are antonyms of "brought a close." These words signify a fresh start or the beginning of a new chapter, whereas "brought a close" denotes finality. Other antonyms include "extended," "prolonged," "continued," and "renewed." These words indicate the continuation of an activity, event, or process. In essence, the antonyms of "brought a close" are words that imply continuation, renewal, ongoing activity, and fresh starts.