reactionary

US /riˈæk.ʃən.er.i/
UK /riˈæk.ʃən.er.i/
1.

phản động

a person who is opposed to political or social change or new ideas:

:
Reactionaries are preventing reforms.
1.

phản động

opposed to political or social change or new ideas:

:
Reactionary forces/elements in the industry are preventing its progress toward greater efficiency.