Someone who is enisled is separated from others, either literally — as Napoleon was enisled on the islands of Elba and then St. Helena — or figuratively, as a person cut off emotionally or socially from others.
Popularized in the 19th century by poets like Matthew Arnold, who used it in his 1852 poem "To Marguerite: Continued," the word enisled reflects a sense of profound emotional isolation within modern society: surrounded by millions of people, yet feeling disconnected. Some people may choose to be enisled, seeking to escape the hustle and bustle of life and find some peace and quiet. The term also applies literally to geography: Land cut off by rising tides or newly carved channels has been physically transformed into an island.