Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
irrĕlĭgĭōsus (inr-), a, um, adj. [2. inreligiosus], irreligious, impious (not anteAug.): irreligiosum ratus, sacerdotes pedibus ire, etc., Liv. 5, 40 fin.: cujus (templi) dedicationem differre longius irreligiosum est, Plin. Ep. 4, 1, 5; 9, 35, 1: in Caesares, Tert. ad Nat. 1, 17.
Comp.: potest irreligiosius quidpiam existimari? Arn. 5, 185.
Sup.: factum irreligiosissimum, Tert. Or. 12.
Adv.: irrĕlĭgĭōsē, impiously: si qua irreligiose dixisset, Tac. A. 2, 50.
Comp., Arn. 1, 13; Tert. ad Nat. 1, 10.