#deterioration__impairment  a symptom of reduced quality or strength
  supertype:  decay.unsoundness  an inferior state resulting from the process of decaying; "the corpse was in an advanced state of decay"; "the house had fallen into a serious state of decay and disrepair"
  subtype:  corrosion  a state of deterioration in metals caused by oxidation or chemical action
  subtype:  desolation__devastation__ruin  the state of being decayed or destroyed
     subtype:  blight.desolation  a state or condition being blighted
  subtype:  decrepitude__dilapidation  a state of deterioration due to old age or long use
  subtype:  wear  impairment resulting from long use; "the tires showed uneven wear"

No statement uses or specializes deterioration; click here to add one.