1. Intellectually or emotionally overwhelming
   "a mind-boggling display"; "a mind-boggling puzzle"

See also: impressive

• footcandle
• footed
• footedness
• footer
• footfall
• footfault
• footgear
• foothill
• foothold
• footie
• footing
• footle
• footless
• footlights
• footling
• footlocker
• footloose
• footman
• footmark
• footnote
• footpad
• footpath
• footplate
• footprint
• footprint evidence