This is the 6092nd most frequent Russian word.
справедливого
Fair, just.
In this context, 'справедливого' is used as a genitive singular adjective agreeing with the noun it modifies, emphasizing fairness as a characteristic.
Это решение казалось людям очень справедливого.
This decision seemed very fair to the people.
Here, 'справедливого' acts as a genitive singular adjective describing the noun 'закона', indicating the just nature of the law being defended.
Мы идём на митинг в защиту справедливого закона.
We are going to a rally in support of a fair law.
In this example, 'справедливого' is functioning as a genitive singular form to reflect the attributive quality of fairness in the subject’s self-description.