Un-frequented means a place where not many people visit, and it becomes challenging to find a word opposite to the term. However, some words can denote the opposite meaning of un-frequented, such as crowded, bustling, populated, frequented, visited, or populated. With these words, we can describe a place where many people gather and spend time. Frequenting the place now and then makes it more livable and desirable. Overall, the antonyms of un-frequented help us identify places where people go to socialize or do some activities, having a bustling atmosphere with less isolation.