Something grassroots is at the most basic level of something, down there in the dirt with the roots of an idea or activity. If you’re looking to make a change from the ground up, start at the grassroots.
If you want a gorgeous yard, don’t fluff the blades of grass, get down to work on the roots and soil. The grassroots is the most fundamental, basic level of well, grass, but also ideas or political movements. Freedom is a grassroots value of America. Love is a grassroots part of marriage. Reading and writing are grassroots elements of education. Grassroots is where things begin and shoot out from.