Unadult is a term used to describe something that is not fully mature or developed. There are several synonyms that can be used to describe this concept including immature, juvenile, adolescent, and unfinished. These terms all imply a lack of completed growth or progression, whether it be physical or mental. The term unripe may also be used to describe something that is not fully formed or developed. Additionally, the term inexperienced can be used to describe someone who has not yet gained knowledge or life experience in a particular area. No matter which synonym is used, they all refer to something that is not yet fully grown or developed.