taint
verb [ T ] uk/teɪnt/ us/teɪnt/
（通过添加有害物质而）污染（食品、血液等）；玷污，败坏
to spoil something, especially food or blood, by adding a harmful substance, or to spoil people's opinion of someone
His reputation was permanently tainted by the financial scandal. 那起财务丑闻让他一辈子声名狼藉。