Alternative formsEdit


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).



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 termsEdit

Related termsEdit


  • aestus in Charlton T. Lewis and Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879
  • aestus in Charlton T. Lewis, An Elementary Latin Dictionary, New York: Harper & Brothers, 1891
  • aestus in Gaffiot, Félix, Dictionnaire illustré Latin-Français, Hachette, 1934
  • Carl Meissner; Henry William Auden, Latin Phrase-Book[1], London: Macmillan and Co., 1894
    • 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