Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
per-săpĭens, entis, adj., very wise, homo, Cic. Prov. Cons. 18, 44.
Hence, adv.: persăpĭenter, very wisely: persapienter dat ipsa lex potestatem defendendi, Cic. Mil. 4, 11.