insular
Pronunciation: /ˈɪnsjʊlə/
adjective
- 1ignorant of or uninterested in cultures, ideas, or peoples outside one’s own experience: a stubbornly insular farming people
- lacking contact with other people: people living restricted and sometimes insular existences

Origin:
mid 16th century (as a noun denoting an islander): from late Latin insularis, from insula 'island'