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

See also: insoluble

Encyclopedia: Insolvable

• normalcy
• normalisation
• normalise
• normaliser
• normality
• normalization
• normalize
• normalizer
• normally
• Norman
• Norman architecture
• Norman Conquest
• Norman Jewison
• Norman Mailer
• Norman Mattoon Thomas
• Norman Rockwell
• Norman Thomas
• Norman-French
• Normandie
• Normandy
• normative
• Normodyne
• normotensive
• normothermia
• Norn