Tardiest

adjective

1. Late; overdue or delayed.

   "He yawned, then raised a tardy hand over his mouth."

2. Moving with a slow pace or motion; not swift.
3. Ineffectual; slow-witted, slow to act, or dull.

   "His tardy performance bordered on incompetence."

4. Unwary; unready (especially in the phrase take (someone) tardy).
5. Criminal; guilty.