IPA: /ˈɑːrk.dʒuːk.dəm/
KK: /ˈɑːrkˌdʒuːk.dəm/
A territory or domain ruled by an archduke, which is a high-ranking noble title in some European countries.
The archdukedom was known for its rich history and beautiful landscapes.
Archdukedom is formed from "arch-" (meaning chief or principal) and "duke" (from Old French *duc*, meaning leader or commander) and "-dom" (meaning state or condition). The term refers to the state or condition of being an archduke, the highest rank of nobility below a king.
Think of 'arch-' meaning chief, and 'duke' as a leader, combined with '-dom' which indicates a state. This helps you remember that an archdukedom is the chief state of a leader.
No commonly confused words.