'unintegrated' originates from English, formed by the prefix 'un-' (a negation element of Germanic/Old English origin meaning 'not') attached to 'integrated', where 'integrate' ultimately comes from Latin 'integrare' meaning 'to make whole'.

'integrate' entered English from Latin 'integrare' (via Medieval Latin/Old French influence) and Middle English adaptations; the past participle 'integrated' became common in Modern English, and the productive English prefix 'un-' was later attached to form 'unintegrated'.

Originally Latin 'integrare' meant 'to make whole' (from 'integer', 'whole'); over time English 'integrate' came to mean 'to bring parts into a whole or system', and 'un-' negates that, giving 'unintegrated' the current sense of 'not brought into a whole or system' (including social or technical contexts).