1. Not easily solved
   "an apparently insolvable problem"
   - unsoluble, unsolvable, unresolvable

See also: insoluble

Encyclopedia: Insolvable

• virulently
• virus
• virus infection
• virusoid
• vis major
• vis-à-vis
• visa
• visage
• visaged
• motherly
• Motherwell
• motherwort
• mothproof
• mothy
• motif
• motile
• motilin
• motility
• motion
• motion picture
• motion sickness
• motion study
• motion-picture camera
• motion-picture fan
• motion-picture film