Acknowledgement is an important part of any communication or transaction. It indicates that the message or task has been received and understood. However, when there is no acknowledgement, it can cause confusion and frustration. The word "un-acknowledged" refers to something that has not been acknowledged, recognized, or admitted. Some antonyms for this term are appreciated, recognized, admitted, approved, and confirmed. When we appreciate or recognize someone's efforts, we acknowledge their hard work and dedication. A person's success can be approved or confirmed by a higher authority, indicating recognition and acknowledgement of their talent and abilities.