This is the 4332nd most frequent Russian word.
беспристрастно
Impartially.
In this sentence, "беспристрастно" emphasizes the objective and non-biased nature of the evaluation.
Он оценил результаты работы беспристрастно.
He evaluated the work results impartially.
Here, "беспристрастно" prefaces a statement indicating fairness and lack of subjective judgment.
Беспристрастно говоря, её идея действительно имеет смысл.
Impartially speaking, her idea truly makes sense.
In this context, "беспристрастно" underlines the ethical requirement of being unbiased in judicial actions.