marginalize

US /ˈmɑːr.dʒɪ.nəl.aɪz/
UK /ˈmɑːr.dʒɪ.nəl.aɪz/
"marginalize" picture
1.

to treat a person, group, or concept as insignificant or peripheral

:
The new policy tends to marginalize the voices of minority groups.
His radical ideas were marginalized by the mainstream media.