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Adjective: untreated  ,ún'tree-tid
  1. (of a specimen for study under a microscope) not treated with a reagent or dye
     
  2. Not given medical care or treatment
    "an untreated disease"; "the untreated wounded lay on makeshift cots"
     
  3. Not subjected to chemical or physical treatment
    "an untreated fabric"

See also: raw, unprocessed, unstained

Antonym: treated