The judge must fairly decide the case.

To make or become just, equitable, or impartial.
The teacher will fair the grades.
Let's fair the costs among us.
We must fair the distribution of resources.
fair the distribution
fair the costs
fair the outcome
equalize
adjust
balance
The judge made a fair decision.

Free from bias, favoritism, or injustice.
The game was fair for everyone.
Her judgment was fair and just.
A fair price is important to buyers.
fair play
fair treatment
fair competition
just
equitable
impartial