Marginalize (verb)

1. To treat or regard as peripheral or of secondary importance.
2. To exclude or isolate (someone or something) from the mainstream or from full social, economic, or political participation.
3. To reduce the significance or value of (something).

Origin:

Mid 19th century: from french marginaliser, from marginal (see marginal).

Examples:

1. The new policy will only serve to marginalize communities that are already struggling.
2. Her unique ideas were marginalized by her more conservative colleagues.
3. The minority group was marginalized by the dominant culture and excluded from full participation in society.
4. The artistic expression of the marginalized communities was finally given a platform for wider recognition and appreciation.
5. The marginalized voices of the people were finally heard, their opinions and experiences shaping the future of the nation.