(しじょう)(まじ)える

しじょうをまじえる
expression
to let personal feelings interfere
expression
1. to let personal feelings interfere; allow private bias in
To allow one's personal feelings or private interests to affect a decision or judgment that should be impartial. Usually used in the negative to insist on fairness.
私情(しじょう)(まじ)えず判断(はんだん)する
To judge without letting personal feelings interfere.
採点(さいてん)私情(しじょう)(まじ)えていけない。
You must not let personal bias into the grading.
Even when judging a friend, he evaluated fairly without letting personal feelings in.

私情(しじょう) means private feelings or personal interest, as opposed to public considerations. The expression most often appears in the negative — 私情(しじょう)(まじ)えず or 私情(しじょう)(はさ)ず — to stress impartiality.

Common collocations

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Somewhat formal; common in workplace, legal, and evaluation contexts.