Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in-fandus, a, um, adj., unspeakable, unutterable, unheard of, unnatural, shocking, abominable (class.): res crudelis, infanda, Cic. de Or. 2, 79, 322: impurum atque infandum corpus, id. Sest. 55, 117: epulae, i. e. of human flesh, Liv. 23, 5 fin.: dolor, Verg. A. 2, 3: amor, id. ib. 4, 85: labores, id. ib. 1, 597: bellum, id. ib. 7, 583: mors, id. ib. 10, 673: dies, id. ib. 2, 132: Cyclopes, id. ib. 3, 644: stuprum, Liv. 1, 59, 8: caedes, id. 4, 32, 12; 29, 8, 8; Plin. 28, 7, 23, § 77.
In the neutr. plur. absol.: infanda furens, Verg. A. 8, 489: jam fero infandissima, Varus ap. Quint. 3, 8, 45.
In the neutr. as exclamation: navibus, infandum! amissis, oh, woe unutterable, Verg. A. 1, 251; so, infandum! sistunt amnes, id. G. 1, 479.