noun / verb
advocate
AD-vuh-kayt/ˈædvʌkʌt/
Speaking in support of a person, group, or cause.
The speaker advocates an accessible playground using a model with a ramp.

Etymology
The pieces give the image of someone ‘called to’ another’s aid, especially to plead on that person's behalf. To advocate carries that representative role into speaking publicly in favor of a cause or idea.
In context
It means taking steps to advocate for the vulnerable and changing social structures to prevent injustice.
More examples
- She became an advocate for safer streets.
- They advocated changing the policy.
- The group is advocating reform.
Forms
advocate · advocates · advocated · advocating
advocacy noun — public support for a cause