im ‧ par ‧ tial /ɪmˈpɑːʃ ə l $ -ɑːr-/ BrE AmE adjective
not involved in a particular situation, and therefore able to give a fair opinion or piece of advice SYN fair OPP biased :
We offer impartial advice on tax and insurance.
an impartial inquiry into the deaths
an impartial observer
—impartially adverb
—impartiality /ɪmˌpɑːʃiˈæləti, ɪmˌpɑːʃiˈælɪti $ -ɑːr-/ noun [uncountable]