duchess
/ˈdʌtʃɪs/noun
1- the wife or widow of a duke公爵夫人。
1.1
- a woman holding a rank equivalent to duke in her own right女公爵。
1.2
- Brit. informal (especially among cockneys) an affectionate form of address used by a man to a girl or woman he knows well〈英, 非正式〉姑娘, 夫人（尤指伦敦东区男性对女子的昵称）。
词源
late Middle English: via Old French from medieval Latin ducissa, from Latin dux, duc- （see DUKE）.