Getting hang of something refers to mastering a skill or understanding a concept. The antonyms of "getting hang of" include losing grasp, failing to comprehend, struggling with, being unable to master, and not picking up. These words imply a lack of understanding or difficulty in comprehending a concept. When one cannot get a hang of something, it may lead to frustration and inability to progress. It is essential to note that mastering skills or understanding concepts takes time, practice, and patience. Therefore, it is vital to persevere despite challenges and seek help when necessary to achieve our goals.