From Proto-Indo-European *h₂eydʰ- ‎(burn; fire). Cognate with Latin aestās, poss. 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.

Case Singular Plural
nominative aestus aestūs
genitive aestūs aestuum
dative aestuī aestibus
accusative aestum aestūs
ablative aestū aestibus
vocative aestus aestūs

Derived termsEdit



  • aestus in Charlton T. Lewis & 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 Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (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