euphemism

1. N-COUNT A euphemism is a polite word or expression that is used to refer to things that people may find upsetting or embarrassing to talk about, for example sex, the human body, or death. 委婉语

The term "early retirement" is nearly always a euphemism for layoffs nowadays. 如今“提前退休”这个词几乎总是下岗的委婉语。