impermissible
1. [ adjective ] not allowable
Related terms: inadmissible
2. [ adjective ] not permitted
Examples:

"impermissible behavior"

Related terms: permissible forbidden forbidden unmentionable untouchable intolerable
Similar spelling:   impermissibly
  impermissibility
  impermeable
  imperishable
  imperceptible
  impermeableness
  improperness
  impressible
  imperialistic
  imperviable
  impermeability
  imperceptibly
  imperturbable
  impersonal
  imperialist
  imperialism