IPA: /ˈæd.və.kə.si/
KK: /ˈæd.və.kə.si/
The act of supporting or arguing for a particular cause, idea, or policy.
Her advocacy for environmental protection has inspired many to take action.
Advocacy is formed from "ad-" (meaning to or towards) and "vocare" (meaning to call). The word refers to the act of calling for or supporting a cause or policy.
Think of 'calling towards' something — 'ad-' means to or towards, and 'vocare' means to call, which helps you remember that advocacy is about supporting a cause.