An unqualified person does not have the qualifications needed for a particular job.

not limited in any way; to the largest degree possible

We achieved a lot but I wouldn't say that the project has been an unqualified success. 我们取得了很大成绩，但我还不能说该项目已经取得了完全成功。

The proposal has the unqualified support of the entire committee. 提议得到了整个委员会的全力支持。