LATIN DICTIONARYLexicon Latīnum
English → Latin

“royal” in Latin

The English word royal itself goes back to Latin rēx, through rēgālis.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

royal
regius, or the genitive, regis (of or belonging to a king, that relates to his person or dignity): regalis (worthy of a king, fit for a king. ☞ This distinction is always observed by good prose writers; in Cic., Tusc., 1, 48, 116, and Nep., Eum., 13, 3, ornatus regius is the ornament which belongs to the king; but in Cic., De Fin., 2, 21, 69, ornatus regalis is ornament as rich as that of a king; again, cultus regius, Sall., Cat., 37, 4, is magnificence such as a king has or ought to have; but Hor., Od., 4, 9, 15, cultus regalis is only magnificence like that of a king; sententia regia is an opinion, sentence of a king; sententia regalis, noble, worthy of a king). The royal family, reges; *domus regia.

Quick answer

What is the Latin word for royal?
The usual Latin words for “royal” are rēgius, rēx, rēgālis; also is. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.