circumlocution
noun [ C or U ] formal uk/ˌsɜː.kəm.ləˈkjuː.ʃən/ us/ˌsɝː.kəm.ləˈkjuː.ʃən/
（尤指对不好的事情的）迂回曲折的说法;婉转语，遁词
(an example of) an indirect way of saying something, especially something unpleasant
"Economical with the truth" is a circumlocution for "lying". “对实情惜字如金”是“撒谎”的委婉说法。
Politicians are experts in circumlocution. 政客们极擅长拐弯抹角地讲话。