Lewis & Short

dĕcŏris, e, or dĕcŏr, adj. [decus], ornamented, adorned, elegant, beautiful (only in the follg. passages; hence nom. dub.; cf.: dedecor and indecoris): magnam domum decoremque Ditem vexarant, Naev. ap. Prisc. p. 699 P.: equis et armis decoribus cultus, Sall. H. Fragm. ib. (Hist. 3, 14).
Adv.: dĕcŏrĭter, elegantly, beautifully: impeditos crinium globos, App. M. 5, p. 168, 23; 11, p. 185, 19 al.