The word "acknowledgeable" is used to describe someone or something that is recognized, known or admitted. However, its antonyms describe people who are not easily recognized, known or admitted. Words like "unrecognizable", "unknown" and "unacknowledged" are antonyms of "acknowledgeable". When something is unrecognizable, it means it is impossible to identify or to grasp. Similarly, something that is unknown is not familiar or recognized. Lastly, something that is unacknowledged is not accepted, recognized, or considered. In short, acknowledging someone or something means that it is being recognized, whereas its antonyms signify the opposite, that they are not being recognized.