Grassroots (adjective)

1. Relating to or involving ordinary people, especially those considered to be the basic source of political power.
2. Relating to the most basic or fundamental level of something.

Origin:

Late 19th century: from grass roots, in reference to the literal meaning of the roots of grass, denoting a basic or fundamental level.

Examples:

1. The grassroots campaign was successful in raising awareness of the issue.
2. The political movement started at the grassroots level and quickly gained momentum.
3. The grassroots support for the candidate was strong.
4. The grassroots initiative was designed to give a voice to the people.
5. The company was founded on the principles of grassroots entrepreneurship.