regalia
/rɪˈgeɪlɪə/plural noun
treated as sing. or pl.
1- the emblems or insignia of royalty, especially the crown, sceptre, and other ornaments used at a coronation王位标志, 王权标志（尤指加冕时用的王冠、权杖和其他饰品）。
1.1
- the distinctive clothing worn and ornaments carried at formal occasions as an indication of status（正式场合象征地位的）服饰：
the Bishop of Florence in full regalia.
全副正装打扮的佛罗伦萨主教。
USAGE
The word regalia comes from Latin and is, technically speaking, the plural of regalis. However, in the way the word is used in English today it behaves as a collective noun, similar to words like staff or government. This means that it can be used with either a singular or plural verb （the regalia of Russian tsardom is now displayed in the Kremlin or the regalia of Russian tsardom are now displayed in the Kremlin）, but it has no other singular form.
词源
mid 16th cent. （in the sense 'royal powers'）： from medieval Latin, literally 'royal privileges', from Latin, neuter plural of regalis 'regal'.