Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
per-scĭens, entis, Part. [scio], knowing well.
With acc.: animum persciens, Lampr. Commod. 5, 2.
Hence, adv.: per-scĭenter, very knowingly, very discreetly, Cic. Brut. 55, 202.