1. Insusceptible of reform
   - irreclaimable, irredeemable, unredeemable 
2. Unrepentant and incapable of being reformed
   - unregenerate

See also: incorrigible, wicked

• hypothecation
• hypothermia
• hypothermic
• hypothesis
• hypothesise
• hypothesize
• hypothetic
• hypothetical
• hypothetical creature
• hypothetical imperative
• hypothetically
• hypothrombinemia
• hypothyroidism
• hypotonia
• hypotonic
• hypotonicity
• hypotonus
• hypovitaminosis
• hypovolaemia
• hypovolaemic
• hypovolemia
• hypovolemic
• hypovolemic shock
• hypoxaemia
• hypoxemia