IPA: /ˌʌnəˈsɛmbəld/
KK: /ʌnəˈsɛmbəld/
Not put together; in parts that need to be assembled before use.
The furniture came unassembled, so I had to follow the instructions to put it together.
Unassembled → It is formed from "un-" (meaning not) and "assembled" (from Latin "assimulare", meaning to bring together or put together). The word "unassembled" means not put together or not assembled.
Think of something that is 'not' ('un-') 'put together' — that's why unassembled means it hasn't been assembled.