The word "archduchess" is spelled with the prefix "arch-" meaning "chief" or "first", followed by "duchess", which refers to a female member of a duke's family. The pronunciation is ɑːrtʃˈdʌtʃɪs, with the stressed syllable on the second syllable, "duch". The "ch" sound in "archduchess" is pronounced as /tʃ/, which represents the sound made by the letters "c" and "h" together. This word is used primarily to refer to the female member of an imperial or royal family who holds the title of archduke.
His wife, sister, or daughter.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word archduchess is derived from the German term Erzherzogin, which originated in the Holy Roman Empire during the Middle Ages. The term consists of two elements: Erz- meaning arch- or first, and Herzogin meaning duchess. It was used to denote the female heir or wife of the archduke, who was the ruler of one of the territories that constituted the Holy Roman Empire. The title archduke itself has similar roots, derived from archidux in Latin, meaning chief or highest duke.