impermissible /im-pər-misˈi-bl/

1. Not permissible
2. Not allowed

impermissibilˈity noun

• umps
• umpteen
• umpteenth
• umptieth
• umpty
• umquhile
• umra
• umrah
• umrahs
• umras
• UMTS
• umwhile
• 'un
• un
• un-
• UN
• UNA
• unabashed
• unabated
• unabbreviated
• unable
• unable to believe one's ears
• unable to believe one's eyes
• unabolished
• unabridged