unbiassed

Verb

unbias (third-person singular simple present unbiases or (rare) unbiasses, present participle unbiasing or (rare) unbiassing, simple past and past participle unbiased or (rare) unbiassed)

1. (transitive) To free (someone or something) from bias or prejudice.
   • But before Things proceed to open Violence, the trueſt Service a private Man may hope to do his Country, is by unbiaſſing his Mind as much as poſſible, and then endeavoring to moderate between the Rival Powers, […]1708 January (date written), [Jonathan Swift], “The Sentiments of a Church of England-man with Respect to Religion and Government”, in Miscellanies in Prose and Verse, volume I, London: […] John...