the.com/tainted
Once pure, now carrying an invisible stain that no amount of scrubbing removes.
means Spoiled, contaminated, or morally compromised by contact with something harmful or corrupt.
from A tangle of two roots: Latin tingere, to dye or stain, blurred with attaint, to convict or accuse — so the word colors and condemns in one stroke.
Double parentBorn from words meaning dye and convict.
Legal ghostAttainted nobles lost titles and inheritance entirely.
Still spreadingTainted evidence can poison an entire case.