This is the 12741st most frequent Polish word.
nierówne
Uneven or unequal.
This usage of 'nierówne' refers to uneven or irregular surfaces, literally describing the physical state of the roads.
Drogi w górach są często nierówne.
The roads in the mountains are often uneven.
Here, 'nierówne' describes inequality in size or proportion of the divided cake pieces.
Podzielili tort na nierówne części.
They divided the cake into unequal parts.
In this sentence, 'nierówne' highlights the difference in probability or advantage between parties.