1. Not permissibly
   "the radon level in the basement was impermissibly high"

See also: impermissible

Antonym: permissibly

• hang by a thread
• hang glide
• hang glider
• hang gliding
• hang in
• hang on
• hang together
• hang-up
• hangar
• hangar queen
• hangbird
• Hangchow
• hangdog
• hanger
• hanger-on
• hangi
• hanging
• hanging chad
• hanging fly
• Hanging Gardens of Babylon
• hanging geranium
• hanging wall
• hangman
• hangman's halter
• hangman's rope