grass root

مردم نهاد
grass - root organization
سازمانهای مردم نهاد

بنیادی، اصلی
basic, fundamental
the most basic level of an activity or organization.
the ordinary people in a society, movement, or organization

بنیادی، اساسی، ریشه ای
The mainstream environmental groups such as Friends of the Earth, Greenpeace, WWF and Sierra Club are largely in the reform group and increasingly have moved from grass roots activism and mass protest to political lobbying and working with business and government.