incorrigible (adj.)
- bad
- chronic
- confirmed
- contumacious
- deep-rooted
- deep-seated
- deep-set
- defiant
- established
- fast
- fixed
- fractious
- gone
- graceless
- habitual
- hardened
- hopeless
- implanted
- incurable
- indocile
- indomitable
- inflexible
- ingrained
- inoperable
- intractable
- inveterate
- irreclaimable
- irrecoverable
- irredeemable
- irremediable
- irreparable
- irrepressible
- irretrievable
- irreversible
- irrevocable
- lost
- naughty
- obdurate
- obstreperous
- recalcitrant
- refractory
- resistant
- resisting
- restive
- rooted
- ruined
- set
- settled
- shrewish
- sinful
- stubborn
- terminal
- thorough
- unalterable
- unchangeable
- uncontrollable
- undone
- ungovernable
- unmalleable
- unmanageable
- unmitigable
- unredeemable
- unregenerate
- unruly
- unsubmissive
- villainous
- wicked
- wild