regem
Regem is the accusative singular form of the Latin noun rex, meaning "the king." In Latin, regem appears as the direct object of verbs or as part of phrases describing kingship. For example: "Regem salutant" means "they greet the king," and "Ille regem laudat" means "that man praises the king." The form regem is one of the irregular endings of the third declension: nominative rex, genitive regis, dative regi, accusative regem, ablative rege; the plural forms are reges (nominative and accusative), regum (genitive), regibus (dative/ablative). The stem is reg-, and the word is historically linked to a family of Latin derivatives such as regere (to rule) and regalis (royal). Etymology traces rex to Proto-Italic rēx- from a Proto-Indo-European root meaning "to rule."
Usage and context: In classical Latin, rex is used to denote kings of neighboring peoples or mythic
See also: rex, regere, regal. Note: regem is a grammatical form of rex, not a separate lexical