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See also: Somnus



From Proto-Indo-European *swépnos.
Cognates include Ancient Greek ὕπνος ‎(húpnos), Old English swefn, Old Irish súan and Sanskrit स्वप्न ‎(svápna).



somnus m ‎(genitive somnī); second declension

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  1. sleep
  2. drowsiness, slumber sloth, idleness
  3. (figuratively) death


Second declension.

Case Singular Plural
nominative somnus somnī
genitive somnī somnōrum
dative somnō somnīs
accusative somnum somnōs
ablative somnō somnīs
vocative somne somnī

Derived terms[edit]



  • somnus in Charlton T. Lewis & 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, 1883–1887)
  • somnus” in Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (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 Biography and Mythology, London: John Murray