The word "demure" means reserved, modest or shy. Therefore, antonyms for this word would be bold, outgoing, unreserved, or brazen. Other antonyms include flamboyant, ostentatious, showy or self-assured. Individuals who are anything but demure tend to command attention and exude confidence. They can be extroverted, boisterous or outspoken, and unafraid to take risks. These individuals are often widely expressive, direct, or even impulsive, while demure people tend to be more introverted and pensive. Always remember that antonyms of demure are just as important as synonyms to achieve the best understanding of the word's definition.