Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
indĕcor, cŏris, or indĕcŏris, e, adj. [2. in-decorus], unbecoming, unseemly, indecorous, inglorious, disgraceful, shameful (very rare; for the most part poet.): cujus sit vita indecoris, Att. ap. Non. 489, 1: non indecorem tua te regina reliquit, Verg. A. 11, 845; cf. id. ib. 12, 679: non erimus regno (dat.) indecores, id. ib. 7, 231: nec genus indecores, id. ib. 12, 25: obitus, Val. Fl. 1, 810: barba, Amm. 23, 6 al.
in-dĕcŏris, v. indecor.
in-dĕcŏro, āre, v. a., to disgrace, disfigure (rare): me sermone indecorans, Att. ap. Non. 125, 1 (Fragm. Trag. v. 459 Rib.): indecorant bene nata culpae, Hor. C. 4, 4, 36 (al. dedecorant).