IPA: /ˈkæptənsi/
KK: /ˈkæptənsi/
The position or role of being a captain, which includes the authority and responsibilities that come with it.
He was promoted to captaincy after demonstrating excellent leadership skills.
Captaincy → It is formed from "captain" (from Old French *capitain*, meaning chief or leader) and "-cy" (a suffix indicating a state or condition). The word "captaincy" refers to the state or condition of being a captain or leader.
Think of a 'captain' as a leader, and the '-cy' suffix indicates a state, so 'captaincy' means the state of being a leader.