Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. infĕrĭus, adv., v. infra.
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.