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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, neuter nominative singular in -e.

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

Derived terms[edit]

See also[edit]



  • Michiel de Vaan (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden, Boston: Brill Academic Publishers, page 428