1. Incapable of being mitigated
   "stern and unmitigable accusations"

See also: implacable

• diabetic diet
• diabetic retinopathy
• diable
• diablo
• diabolatry
• diabolic
• diabolical
• diabolically
• diabolise
• diabolism
• diabolist
• diabolize
• diabolo
• Diacalpa
• diacetylmorphine
• diachronic
• diachronic linguistics
• diachrony
• diachylon
• diachylum
• diacid
• diaconal
• diaconate
• diacritic
• diacritical