Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
indēbĭtē and indēbĭtō, advv., v. indebitus fin.
in-dēbĭtus, a, um, adj., that is not owed, not due (poet. and post-class.): non indebita posco, I ask nothing that is not due to me, Verg. A. 6, 66: praemia, Ov. H. 16, 9.
Subst.: indēbĭtum, i, n., that which is not due, the performance or payment of which is not due: solvere, Dig. 12, 6, 65; Paul. Sent. 4, 3, 4; Gai. Inst. 3, 91 al.
Hence, adv.: indēbĭtē and indēbĭtō, without just cause, unduly (post-class.).