LATIN DICTIONARYLexicon Latīnum
proper noun · masculinevariously declined, third declension, first declension

Euphrātēs1

Euphrātēs m sg (genitive Euphrātis or Euphrātae)
Classical[ɛu̯ˈpʰraː.teːs]Ecclesiastical[eu̯ˈfraː.tes]

Meaning

  1. Euphrates (a river in West Asia)
  2. A philosopher in the time of Pliny the Younger.
  3. rareA surname.

Declension

declension
formsingularplural
nominativeEuphrātēs—
genitiveEuphrātis
Euphrātae, Eufrātae, Eufrātis
—
dativeEuphrātī
Euphrātae, Eufrātae, Eufrātī
—
accusativeEuphrātem
Euphrātēn, Eufrātem, Eufrātēn
—
ablativeEuphrāte
Eufrāte
—
vocativeEuphrātēs
Euphrātē, Eufrātē
—

Euphrātes (in Inscr. also EVFRATES), is, m., = Εὐφράτης,
I. A wellknown river in Syria, which rises in Armenia, and, after its junction with the Tigris, empties into the Persian Gulf, now Frat, Mel. 1, 11, 2; 3, 8, 5; Plin. 5, 24, 20, § 83 sqq.; Prud. Ham. 562; Cic. N. D. 2, 52, 130; Plin. Pan. 14; abl. Euphratē, Luc. 8, 358.—
2. Meton., the dwellers on its banks, Verg. G. 1, 509.—Hence,
A. Euphrā-taeus, a, um, = Εὐφραταῖος, of the Euphrates, i. e. Armenian: diademata, Stat. S. 2, 2, 122.—
B. Euphrātis, ĭdis, f., adj., of the Euphrates: ripa, Sid. Ep. 8, 9. —
II. A philosopher in the time of the younger Pliny, Plin. Ep. 1, 10.—†
III. A rare Roman surname: M. IVNIVS EVFRATES, Inscr. in Bull. dell. Inst. 1844, p. 90.

Origins

From Ancient Greek Εὐφράτης (Euphrátēs), from Old Persian 𐎢𐎳𐎼𐎠𐎬𐎢 (u-f-r-a-tu-u /⁠ʰUfrātuš⁠/), itself from Akkadian 𒀀𒇉𒌓𒄒𒉣 (^(ÍD)Purattu), from Sumerian 𒀀𒇉𒌓𒄒𒉣 (^(ÍD)Buranun). See English etymology for further details.

In the Academy Smith's classical dictionaries

noun · masculinethird declension
Euphrātēs2
Euphrātēs m (genitive Euphrātis)
Classical[ɛu̯ˈpʰraː.teːs]Ecclesiastical[eu̯ˈfraː.tes]

Meaning

  1. Those who dwell on the banks of the Euphrates river.

Declension

declension
formsingularplural
nominativeEuphrātēsEuphrātēs
genitiveEuphrātisEuphrātum
dativeEuphrātīEuphrātibus
accusativeEuphrātemEuphrātēs
ablativeEuphrāteEuphrātibus
vocativeEuphrātēsEuphrātēs

Origins

From Ancient Greek Εὐφράτης (Euphrátēs), from Old Persian 𐎢𐎳𐎼𐎠𐎬𐎢 (u-f-r-a-tu-u /⁠ʰUfrātuš⁠/), itself from Akkadian 𒀀𒇉𒌓𒄒𒉣 (^(ÍD)Purattu), from Sumerian 𒀀𒇉𒌓𒄒𒉣 (^(ÍD)Buranun). See English etymology for further details.

In the Academy Smith's classical dictionaries

Quick answers

What does Euphrātēs mean in Latin?
Euphrātēs, a proper noun, means “Euphrates (a river in West Asia); A philosopher in the time of Pliny the Younger.; A surname.”.
What is the genitive of Euphrātēs?
The genitive singular is Euphrātis. Euphrātēs is masculine, variously declined, third declension, first declension.
How do you pronounce Euphrātēs?
In classical Latin, [ɛu̯ˈpʰraː.teːs]; in ecclesiastical (church) Latin, [eu̯ˈfraː.tes].