taint‧ed /ˈteɪntəd, ˈteɪntɪd/ adjective especially American English

1. a tainted substance, especially food or drink, is not safe because it is spoiled or contains a harmful substance or poison:
a tainted blood supply

2. affected or influenced by something illegal, dishonest, or morally wrong:
a tainted witness

[TahlilGaran] Dictionary of Contemporary English ▲