Synonyms of the word 
DYSFUNCTIONAL → IMPAIRED - MALADAPTIVE - NONADAPTIVE
dysfunctional
- adj. Not performing its proper or intended function.
- adj. Functioning incorrectly or abnormally; especially, designating of a business, family or social group with…
impaired
- adj. Rendered less effective.
- adj. inebriated, drunk.
- v. simple past tense and past participle of impair.
- n. A criminal charge for driving a vehicle while impaired.
maladaptive
- adj. (psychology, chiefly of behaviour) Showing inadequate or faulty adaptation to a new situation.
nonadaptive
- adj. Not adaptive; unable to adapt.
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