The word un-adaptable refers to individuals or things that are unable to adjust or change to new situations or circumstances. Antonyms for un-adaptable include words such as adjustable, versatile, flexible, and adaptable. These terms signify a positive quality of being able to adapt and change according to new conditions or circumstances. Adaptable people can cope with unexpected changes in their environment, while flexible and versatile things are functional in different scenarios. Antonyms such as changeable, responsive, and pliable also indicate a willingness to adjust and be open to new experiences. Overall, antonyms for un-adaptable describe people and things that are responsive, flexible, and open to change.