unpartial

From un- +‎ partial.

• (UK) IPA^(key): /ʌnpɑːʃl̩/

unpartial (comparative more unpartial, superlative most unpartial)

1. Impartial, unbiased. [from 16th c.]
   • 1613, John Marston, William Barksted, The Insatiate Countess, IV.1:

     Justice, that makes princes like the gods, / Draws us unto the Senate, / That with unpartial balance we may poise / The crimes and innocence of all offenders.

   • 1621 May 4 (Gregorian calendar), Robert Saunderson [i.e., Robert Sanderson], “[Ad Clerum.] The Second Sermon. At a Visitation at Boston, Linc[olnshire] 24. April. 1621.”, in Twelve Sermons, […], [new] edition, London: […] Aug[ustine] Math[ews], for Robert Dawlman, and are to be sold by Robert Allet, […], published 1632, →OCLC, §. 18, pages 59–60:

     [S]uch as therefore ſhould not be adventured vpon vvithout mature and vnpartiall diſquiſition of the vprightneſſe of our affections therein, […]

   • 1998 March 4, Baltic News Service:

     The Liberal Union […] approves the idea of guaranteeing an unpartial and proper trial.

2. Not partial (to); antagonistic. [from 19th c.]
   • 2014 May 16, Technology Tell‎, archived from the original on 24 March 2016:

     I’m particularly unpartial to Bluetooth with its pairing hassles (the K-750s use an RF interface and a USB receiver dongle), but for the past 3-1/2 years, Bluetooth keyboards have been the only external input devices supported on the iPad and other iOS machines.

• unpartially

• tarpaulin