Skip to definition.

Adjective: unhealthful  ,ún'helth-ful
  1. Not sanitary or healthful
    "unhealthful open sewers";
    - unsanitary, insanitary
  2. Detrimental to good health
  3. Detrimental to health
    - insalubrious, unhealthy

See also: crippling, cytopathogenic, disabling, incapacitating, infected, infective, morbific, nonmedicinal, pathogenetic, pathogenic, septic, toxic, unhealthy, unhygienic, unmedical, unmedicative, unmedicinal, unwholesome

Antonym: healthful