dysfunctional

/D IH0 S F AH1 NG K SH AH0 N AH0 L/
adjective
  1. 1

    Not performing its proper or intended function.

  2. 2

    Functioning incorrectly or abnormally; especially, designating of a business, family or social group with harmful, aberrant, strange or abnormal behavior.

Source: https://en.wiktionary.org/wiki/dysfunctional