decorateyoudaoicibaDictYouDict
decorate: [16] Decorate comes from Latin decorātus, the past participle of decorāre ‘make beautiful’, a verb derived from decus ‘ornament’. Its root, decor-, also produced the adjective decorus ‘beautiful, seemly’, from which English gets decorous [17] and, via its neuter singular form, decorum [16]. Décor is a 19th-century borrowing from French, where it was a derivative of the verb décorer. From the same ultimate source come decent and dignity.
=> decent, dignity, decorous
decor (n.)youdaoicibaDictYouDict
1897, from French décor (18c.), back-formation from décorer "to decorate" (14c.), from Latin decorare (see decorate). It thus duplicates Latin decor "beauty, elegance, charm, grace, ornament." Originally a theater term in English; general use is since 1926.