Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
infĕrĭae, ārum, f. plur. [inferi], sacrifices in honor of the dead (class.); nom., Ov. M. 13, 613; abl., id. Ib. 454: alicui inferias afferre, Cic. N. D. 3, 16, 42; cf.: absenti ferat inferias, Verg. A. 9, 215; so, referre, Hor. C. 2, 1, 28: alicui dare, Ov. F. 5, 422: mittere, id. M. 11, 381: accipere, id. ib. 8, 488: inferias alicui facere, Tac. H. 2, 95: inferias his annua religione instituit, Suet. Calig. 15; id. Claud. 11; id. Vit. 11 al.
2. infĕrĭus, a, um, adj. [infero], that is offered or sacrificed (ante- and post-class.): vinum, sacrificial wine, Cato, R. R. 132, 2; 134, 3; Arn. 4, 138.