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From frāter (brother) +‎ -nus.



frāternus (feminine frāterna, neuter frāternum, adverb frāternē); first/second-declension adjective

  1. brotherly, fraternal
    Synonym: frāternālis
  2. of or pertaining to a kinsman
  3. friendly, close


First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative frāternus frāterna frāternum frāternī frāternae frāterna
Genitive frāternī frāternae frāternī frāternōrum frāternārum frāternōrum
Dative frāternō frāternō frāternīs
Accusative frāternum frāternam frāternum frāternōs frāternās frāterna
Ablative frāternō frāternā frāternō frāternīs
Vocative frāterne frāterna frāternum frāternī frāternae frāterna

Derived terms[edit]

Related terms[edit]


  • Catalan: fratern
  • Italian: fraterno
  • Portuguese: fraterno
  • Romanian: fratern
  • Spanish: fraterno


  • fraternus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • fraternus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • fraternus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • fraternus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.