cloistered - KLOY-STIRD - isolated, reclusive, shielded

Example: "As with other women in her position, for the former soldier returning from Iraq, cloistering herself seems to make sense. Post-traumatic stress disorder distorts personalities: some veterans who have it fight in their sleep; others feel paranoid around children. And as women return to a society unfamiliar with their wartime roles, they often choose isolation over embarrassment.