Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pervărĭē, adv., v. pervarius fin.
per-vărĭus, a, um, adj., very various: utilitates, App. de Deo Socrat. p. 42 dub.
Adv.: pervărĭē, very variously: pervarie narrantur, Cic. de Or. 2, 80, 327.