non-partisan (adj.)youdaoicibaDictYouDict[non-partisan 词源字典]
also nonpartisan, 1872, American English, from non- + partisan.
FIRST POLITICIAN: Who's backing this non-partisan candidate?
SECOND POLITICIAN: The non-partisan party.
["Life," Sept. 29, 1927]
As a noun from 1888.[non-partisan etymology, non-partisan origin, 英语词源]