Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pĕr-absurdus, a, um, adj., very absurd (class.): haec quia videntur perabsurda, etc., Cic. Part. 15, 54; id. Fin. 3, 8, 27; 3, 9, 31; 5, 11, 30.
Separated: per enim absurdum est, Dig. 22, 3, 25; v. per, II. D.