archduke

n (fem 阴性作 archduchess / 9B:tF5dQtFIs; `BrtF`dQtFIs/) duke of the highest rank, esp (formerly) the son of the Austrian Emperor 大公（尤指旧时奥国皇太子）.

arc, arc lamp, arc light, arc welding, arcade, arcane, arch, arch-, arch-enemy, archaeological, archaeologist, archaeology, archaic, archaism, archangel, archbishop, archbishopric, archdeacon, archdeaconry, archdiocese, archer, archery, archetypal, archetypally, archetype, archipelago, architect, architectural, architecture, archive, archives, archivist, archway, Arctic, Arctic Circle, ardent, ardently, ardor, ardour (US ardor), arduous,