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Aestus marinus.

Alternative forms




From Proto-Italic *aissus, from Proto-Indo-European *h₂eydʰ- (burn; fire), with the -tus suffix from Proto-Indo-European *-tus restored via analogy, cf. aestās. Cognate with perhaps aedis, Ancient Greek αἴθω (aíthō)), Old English ād (pyre).[1]





aestus m (genitive aestūs); fourth declension

  1. heat
  2. fire
  3. tide
  4. surge of the sea
  5. (figuratively) passion
  6. (figuratively) hesitation



Fourth-declension noun.

Case Singular Plural
Nominative aestus aestūs
Genitive aestūs aestuum
Dative aestuī aestibus
Accusative aestum aestūs
Ablative aestū aestibus
Vocative aestus aestūs

Derived terms



  • aestus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • aestus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • aestus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
  • Carl Meißner, Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • ebb and flow (of tide): accessus et recessus aestuum
    • the ebb: decessus aestus
    • the alternation of tides: aestus maritimi mutuo accedentes et recedentes (N. D. 2. 53. 132)
    • the tide is coming in: aestus ex alto se incitat (B. G. 3.12)
    • when the tide begins to go down: aestu rursus minuente
    • to be able to bear heat and cold: aestus et frigoris patientem esse
    • to have a severe attack of fever: aestu et febri iactari
    • at high tide: aestu incitato
  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, page 28