Fromeō +‎-dem.

eōdem (notcomparable)

1. to thesame (place, person, thing)
   • c. 52BCE,Julius Caesar,Commentarii de Bello Gallico5.5:

     Ibi cognoscit LX naves, quae in Meldis factae erant, tempestate reiectas cursum tenere non potuisse atqueeodem unde erant profectae revertisse.

     There he discovers that sixty ships, which had been built in the country of the Meldi, having been driven back by a storm, had been unable to maintain their course, and had returnedto the same port from which they had set out.

   • 45BCE,Cicero,De finibus bonorum et malorum2.102:

     Idemne potest esse dies saepius, qui semel fuit? Certe non potest. An eiusdem modi? Ne id quidem, nisi multa annorum intercesserint milia, ut omnium siderumeodem, unde profecta sint, fiat ad unum tempus reversio.

     Can a day again be, which already was? It assuredly cannot. Or even a similar day? Not even that can be, unless many thousands of years have passed, so that all the stars simultaneously returnto the place whence they have moved.

eōdem

1. ablativemasculine/neutersingular ofīdem

• “eodem”, inCharlton T. Lewis and Charles Short (1879)A Latin Dictionary, Oxford: Clarendon Press
• “eodem”, inCharlton T. Lewis (1891)An Elementary Latin Dictionary, New York: Harper & Brothers
• eodem inGaffiot, Félix (1934)Dictionnaire illustré latin-français, Hachette.
• Carl Meißner, Henry William Auden (1894)Latin Phrase-Book‎^[1], London:Macmillan and Co.
  • these things have the same origin:haec ex eodem fonte fluunt, manant
    
  • to use the same simile, illustration:ut in eodem simili verser