impartial (adj.)
"not partial, not favoring one over another," 1590s, from assimilated form of in- (1) "not, opposite of" + partial. First recorded use is in "Richard II." Related: Impartially.
What Latin word does impartial come from?
Word History: Today's Good Word is an assimilated form of in- "not, opposite of" + partial "biased, prejudiced". This is yet another word English borrowed from French, which inherited it from Latin partialis "divisible, partial", the adjective accompanying pars, partis "part, piece".
What is meant of be impartial?
: not partial or biased : treating or affecting all equally.