Lewis & Short

dē-dĕcor, ŏris, adj., unseemly, unbecoming, shameful, vile (rare): dedecorem amplexi vitam, Stat. Th. 11, 760: alga, Aus. Ep. 9, 5: dedecores inultique caedebantur, Sall. Hist. 3, 91 (ap. Prisc. p. 699 P.).