unstained

From un- +‎ stained.

unstained (not comparable)

1. Not dyed or discolored; not marred by any stains, marks, or spotting.

   The unstained hardwood floor was pale, but the finish soaked in and made the room seem dark.

   • 1899 February, Joseph Conrad, “The Heart of Darkness”, in Blackwood’s Edinburgh Magazine, volume CLXV, number M, New York, N.Y.: The Leonard Scott Publishing Company, […], →OCLC, part I, page 194:

     The water shone pacifically; the sky, without a speck, was a benign immensity of unstained light; the very mist on the Essex marshes was like a gauzy and radiant fabric, hung from the wooded rises inland, and draping the low shores in diaphanous folds.

2. Pure, pristine, clean, immaculate, unadulterated.

   She arrived at the chapel for her marriage with unstained honor.

• unsainted, antidunes, inundates, unsatined