unprofessional

un- +‎ professional

unprofessional (comparative more unprofessional, superlative most unprofessional)

1. unbecoming of a professional; hence inappropriate in the workplace

   unprofessional behavior

2. Lacking a profession.

• unprofessionalize
• unprofessionalization

unprofessional (plural unprofessionals)

1. One who is not a professional.
   • 2011, Jon Sundbo, ‎Marja Toivonen, User-based Innovation in Services (page 59)

     The guests, on the other hand, are unprofessionals, the mere receivers of service, the others. Such is the frame of interaction or the role definitions and how these roles are played out in the service encounters.

• nonprofessional
• amateur