noun
archduke
arch-DUKE/ˌɑːrtʃˈduːk/
A nobleman of high rank in a former Austrian ruling family.
The Austrian archduke stands in formal robes beside his distinctive ceremonial hat.

Etymology
Duke developed from a word for a leader or commander into a noble title; “chief” marks an elevated version of that rank. Archduke served both as a ruler’s title and as an Austrian imperial family dignity.
In context
archduke, a title tied specifically to the Habsburg dynasty and ranking above ordinary dukes within their territories
More examples
- The historian studies the archduke's correspondence.
- Several archdukes belonged to the ruling dynasty.
- The portrait identifies the sitter as an Austrian archduke.
Forms
archduke · archdukes
Similar words
- duke
- A broader noble rank rather than this Austrian dynastic title.