IPA: /ˌʌnəˈtʃiːvd/
KK: /ʌnəˈtʃivd/
Not yet accomplished or realized; something that has not been achieved.
Despite her hard work, many of her goals remain unachieved.
Unachieved → It is formed from "un-" (meaning not) and "achieve" (from Old French *achever*, meaning to complete or bring to a conclusion). The word "unachieved" means not having been completed or brought to a conclusion.
Think of 'not' ('un-') having 'completed' something ('achieve') — that's why unachieved means something that hasn't been completed.