Despite months of therapy, her unimproving condition worried the family.

After years of refinement, she considered the design unimprovable.

The unimprovableness of her thesis impressed the entire committee, who struggled to find any substantive flaws.

He argued that the design's unimprovability proved they shouldn't attempt any more revisions.

The surveyor noted several unimproved lots behind the old mill.

Despite months of training, the team's unimprovement was obvious to the coaches.

Her performance was unimprovably precise, leaving no room for critique.