attaint

1. To impart stigma to; disgrace: "No breath of calumny ever attainted the personal purity of Savonarola" (Henry Hart Milman).
2. To pass a sentence of attainder against.
3. Archaic. To infect or corrupt, as with illness or vice.
4. Archaic. To accuse.

1. Obsolete. Attainder.
2. Archaic. A disgrace; a stigma.

[Middle English attainten, from Old French ataint, past participle of ataindre, to affect. See attain.]

noun

A mark of discredit or disgrace: black eye, blemish, blot, onus, spot, stain, stigma, taint, tarnish. Idioms: a blot on one's escutcheon. See marks, respect/contempt/standing.

To pass sentence of attainder or to be under such a sentence. More generally to be stained or degraded by a conviction. In early common law practice referred to a writ used to challenge a jury verdict. 3 Bl. Comm. *402.

The verb has 2 meanings:

Meaning #1: bring dishonor upon
  Synonyms: dishonor, disgrace, dishonour, shame

Meaning #2: condemn by attainder