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See also: Somnus



From Proto-Italic *swepnos, from Proto-Indo-European *swépnos, from the root *swep- (to sleep) (compare Lithuanian sãpnas, Sanskrit स्वप्न (svapna)).[1]



somnus m (genitive somnī); second declension

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  1. sleep, slumber
    Synonym: sopor
    per somnum/somnossleeping
    in somnis/somnosleeping
    • 8 CE, Ovid, Fasti 2.635:
      iamque ubi suādēbit placidōs nox hūmida somnōs
      And now, when damp night will induce peaceful slumbers
  2. drowsiness, idleness, inactivity, laziness, sloth
  3. (figuratively) death
    Synonyms: mors, fūnus, fātum, exitus, interitus, perniciēs, fīnis, sopor


Second-declension noun.

Case Singular Plural
Nominative somnus somnī
Genitive somnī somnōrum
Dative somnō somnīs
Accusative somnum somnōs
Ablative somnō somnīs
Vocative somne somnī

Derived terms[edit]

Related terms[edit]



  • somnus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • somnus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • somnus 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)
  • somnus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
  • Carl Meißner, Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to lay oneself down to slee: somno or quieti se tradere
    • to be unable to sleep: somnum capere non posse
    • I cannot sleep for anxiety: curae somnum mihi adimunt, dormire me non sinunt
    • I haven't had a wink of sleep: somnum oculis meis non vidi (Fam. 7. 30)
    • to fall fast asleep: artus somnus aliquem complectitur (Rep. 6. 10)
    • to be overcome by sleep: somno captum, oppressum esse
    • to awake: somno solvi
    • to rouse, wake some one: (e) somno excitare, dormientem excitare
    • in a dream: per somnum, in somnis
    • to see something in a dream: in somnis videre aliquid or speciem
    • I dreamed I saw..: in somnis visus (mihi) sum videre
    • to refresh oneself, minister to one's bodily wants: corpus curare (cibo, vino, somno)
  • somnus”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • somnus”, in William Smith, editor (1848), A Dictionary of Greek and Roman Biography and Mythology, London: John Murray
  • Dizionario Latino, Olivetti
  1. ^ De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, pages 573-4