Antonyms of adj untainted

1 sense of untainted

Sense 1
stainless, unstained, unsullied, untainted, untarnished -- ((of reputation) free from blemishes; "his unsullied name"; "an untarnished reputation")

INDIRECT (VIA unblemished) -> blemished -- (marred by imperfections)

Similarity of adj untainted

1 sense of untainted

Sense 1
stainless, unstained, unsullied, untainted, untarnished -- ((of reputation) free from blemishes; "his unsullied name"; "an untarnished reputation")
       => unblemished (vs. blemished), unmarred, unmutilated -- (free from physical or moral spots or stains; "an unblemished record"; "an unblemished complexion")