Protester (noun)

A person who publicly demonstrates or expresses opposition to a particular cause, idea, or policy.

Origin:

Derived from the verb "protest", a protester is a person who publicly demonstrates or expresses opposition to a particular cause, idea, or policy.

Examples:

1. Thousands of protesters took to the streets to demonstrate against the government's policies.
2. The protesters are calling for the resignation of the president.
3. The police used tear gas to disperse the protesters.
4. The protesters were arrested for violating the city's ordinance.
5. The protesters are demanding that the government take action on climate change.