The term "out-going" is often used to describe a person who is sociable, extroverted, and enjoys being around people. Antonyms for out-going could generally refer to a person who is more introverted, shy, or reserved. Some of the common antonyms for the term could include terms like introverted, timid, unsociable, withdrawn, or reclusive. Other antonyms for the term could include terms like reserved, uncommunicative, or quiet. These antonyms describe people who may prefer to spend their time alone, do not enjoy public gatherings, feel uncomfortable meeting new people, and are not very expressive in social situations.