Unrooted refers to something that lacks stability or foundation. Therefore, its antonyms would be words that imply the opposite, such as rooted, grounded, stable, established, well-founded, secure, and dependable. Rooted implies that something is firmly established, while grounded suggests that it has a solid foundation. Stable and secure both suggest that something is steady and unlikely to change. Established and well-founded imply that something has been in existence for a long time and has a solid foundation. Finally, dependable suggests that something can be relied upon and trusted, which is the opposite of unrooted. All of these words can be used as antonyms for unrooted to describe a more stable or secure situation.