1. In an unpleasant or menacing manner
   "it was forbiddingly dark in the corridor"

See also: forbidding

• red-berried elder
• red-blind
• red-blindness
• red-blooded
• red-breasted merganser
• red-breasted nuthatch
• red-breasted sapsucker
• red-breasted snipe
• red-brown
• red-coated
• red-eyed vireo
• red-faced
• red-flowered
• red-flowered silky oak
• red-fruited
• red-gray
• red-green color blindness
• red-green colour blindness
• red-green dichromacy
• red-grey
• red-handed
• red-hot
• red-hot poker
• red-ink
• red-lavender