Modified, limited, conditional on something else. Unqualified can mean not limited or not restrained. If your boss gives unqualified approval for your plan, you can do whatever you want. Of
course, everyone knows qualified in the sense of qualified for the job. Use context to determine which
meaning is intended. A qualified person is suitable or well-prepared for the job; a qualified statement or
feeling is held back or limited.
The scientist gave her qualified endorsement to the book, pointing out that, while it posed a credible theory, more research was still needed before the theory could be applied.