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From Proto-Indo-European *h₃ep-ni- ‎(working), from the verbal root *h₃ep- ‎(to work”, and hence “to possess). Related to ops and opus. It could also reflect the base Proto-Indo-European *h₁op- ‎(to work, to take) (compare optō), to which de Vaan gives a slight preference for semantic reasons.



omnis m, f ‎(neuter omne); third declension

  1. (singular) every
    • Vergilius, Aeneis; Book V, line 710
      Superanda omnis fortuna ferendo est.
      Every misfortune is to be overcome by enduring.
  2. (plural) all
    • Attributed to Ennius by Augustinus in De Trinitate; Book XIII, Chapter III
      Omnes mortales sese laudarier optant.
      All mortals wish to be praised.


Third declension.

Number Singular Plural
Case / Gender Masc./Fem. Neuter Masc./Fem. Neuter
nominative omnis omne omnēs omnia
genitive omnis omnium
dative omnī omnibus
accusative omnem omne omnēs omnia
ablative omnī omnibus
vocative omnis omne omnēs omnia

Derived terms[edit]

See also[edit]



  • De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, page 428