The word "un retiring" refers to someone who is not retiring or shy. Its antonyms, therefore, would refer to individuals who are retiring, shy, or introverted. Some of the widely used antonyms of un retiring include timid, meek, bashful, introverted, reserved, cautious, shy, demure, diffident, and apprehensive. These words describe individuals who may not be comfortable being the center of attention or taking risks. However, they tend to be thoughtful, considerate, and introspective, possessing deeply insightful ideas and perspectives. Understanding the antonyms of un retiring is useful for effective communication and interaction with individuals with diverse personality traits.