What term describes being absent from work without an acceptable reason?

The term that best describes being absent from work without an acceptable reason is actually "Unexcused Absences." This classification refers specifically to instances when an employee fails to report to work and does not provide a valid explanation or justification for their absence.

Absenteeism is a broader term that encompasses the habitual pattern of being absent from work, whether justified or not. It includes a range of reasons and does not solely imply a lack of acceptable reasoning.

Unexplained absences may suggest that the reason for being absent is not communicated or understood but doesn't explicitly capture the absence without an acceptable reason as clearly as "unexcused absences."

Unauthorized leave refers to situations where an employee takes time off without permission or approval from a supervisor. While related, it emphasizes the aspect of lacking approval rather than the absence of an acceptable justification.

Thus, "Unexcused Absences" is the most accurate term for indicating absences that do not have a suitable explanation, making it the correct choice in this context.