This is the 4544th most frequent Catalan word.
oposició
"Opposition."
In this sentence, 'oposició' is used to refer to resistance or disagreement towards something, namely the new measures.
La oposició a les noves mesures va ser contundent.
The opposition to the new measures was strong.
Here, 'oposicions' refers to competitive exams, common in public sector job qualifications in Catalonia and other Spanish-speaking regions.
Està estudiant per a les oposicions a mestre.
She is studying for the teacher selection exams.
In this usage, 'oposició' denotes a political group that opposes or contrasts with the governing entity.