1tar·nish 
/ˈtɑɚnɪʃ/ verb
tar·nish·es; tar·nished; tar·nish·ing /ˈtɑɚnɪʃ/ verb 1 : to become or cause (metal) to become dull and not shiny [no obj] ▪ Silver tarnishes easily. [+ obj] ▪ Some foods will tarnish silver. 2 [+ obj] : to damage or ruin the good quality of (something, such as a person's reputation, image, etc.)
▪ His actions tarnished [=sullied] the family's good name. ▪ The scandal tarnished his reputation.
▪ His actions tarnished [=sullied] the family's good name. ▪ The scandal tarnished his reputation.
— tarnished adjective
▪ tarnished silverware ▪ the company's tarnished image
▪ tarnished silverware ▪ the company's tarnished image
