Sentence:  Miss Ambient, whom I also saw at intervals during the time that followed, has, with her embroideries and her attitudes, her necromantic glances and strange intuitions, retired to a Sisterhood, where, as I am told, she is deeply immured and quite <WSD>lost to the world</WSD>. 
Meaning of the word marked with <WSD> tags:  Physically located in a remote place where one is unnoticed or incommunicado.