Englishimpartial
adjective
the referee is obliged to be impartial:
unbiased, unprejudiced, neutral, nonpartisan, nondiscriminatory, anti-discrimination, disinterested, uninvolved, uncommitted, detached, dispassionate, objective, open-minded, equitable, even-handed, fair, fair-minded, just;
without favoritism, free from discrimination, with no axe to grind, without fear or favor;
informal on the fence.
▷antonyms biased, partisan.