She smiled undefinably, leaving everyone unsure whether she was amused or apologetic.

The mayor's explanation was undefendable after the leaked emails proved otherwise.

He described the timeline undefinedly, so the team couldn't plan their work.

The committee marked the deadline as undeferrable, forcing the team to prioritize the project immediately.

During the code review, her comment highlighted the undefinedness of the configuration settings and sparked a deeper investigation.

The museum's exhibit labels remained undefaced despite the crowded opening night.

The committee voted to undefine the criteria to allow for more flexible decisions.

Despite the teacher's harsh reprimand, the student remained undefiant and quietly accepted the consequences.

Her undefensive reply surprised everyone in the meeting.

Mathematicians often debate whether undefinables can ever be fully characterized.