1. Incapable of being justified or explained
   - indefensible, insupportable, unjustifiable, unwarranted

See also: inexcusable, unwarrantably

• cupric sulphate
• cupriferous
• Cuprimine
• cuprite
• cupronickel
• cuprous
• cupular
• cupulate
• cupule
• Cuquenan
• Cuquenan Falls
• cur
• curability
• curable
• curableness
• curacy
• curandera
• curandero
• curare
• curassow
• curate
• curate cycloid
• curative
• curator
• curatorial