#unhealthfulness__unhealthfulnes  the quality of promoting poor health
  exclusion:  healthfulness
  supertype:  unwholesomeness__unwholesomenes__morbidnes__morbidity  the quality of being unhealthful and generally bad for you
  subtype:  insalubrity__insalubriousness  the quality of being insalubrious and debilitating

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