1. Offensive to the mind
   - abhorrent, obscene, repugnant, repulsive 
2. Unequivocally detestable
   "detestable vices"
   - abominable, execrable, odious

See also: hateful, offensive

• inconvenient
• inconveniently
• inconvertibility
• inconvertible
• incoordination
• incorporate
• incorporated
• incorporation
• incorporative
• incorporeal
• incorporeality
• incorrect
• incorrectly
• incorrectness
• incorrigibility
• incorrigible
• incorrigibly
• incorrupt
• incorruptibility
• incorruptible
• incorruptibly
• incorruption
• incorruptness
• increase
• increased