This is the 282nd most frequent Hungarian word.
ellenzéki
Oppositional or opposition (related to being against or part of the opposition).
Here, 'ellenzéki' is used as an adjective describing 'pártok' (parties), indicating they belong to the opposition.
Az ellenzéki pártok tiltakoztak az új törvény ellen.
The opposition parties protested against the new law.
'Ellenzéki' modifies 'média' (media) as an adjective, suggesting the media aligns with or represents opposition views.
Az ellenzéki média kritikusan fogalmazott.
The opposition media expressed criticism.
In this sentence, 'ellenzéki' functions as an adjective describing 'képviselő' (representative), signifying their political alignment.