un ‧ dif ‧ fer ‧ en ‧ ti ‧ at ‧ ed /ˌʌndɪfəˈrenʃieɪtəd, ˌʌndɪfəˈrenʃieɪtɪd/ BrE AmE adjective
something which is undifferentiated is not split into parts, or has different parts but you cannot tell the difference between them:
shows aimed at large undifferentiated groups of people
Colonial officials tended to see Indian society as an undifferentiated whole.