#6578 פְּרָת P@rath {per-awth'}

 from an unused root meaning to break forth; TWOT - n/a; n pr m

—Hebrew Word Study (Transliteration-Pronunciation Etymology & Grammar)

 Euphrates = "fruitfulness"
 1) the largest and longest river of western Asia; rises from two chief
    sources in the Armenian mountains and flows into the Persian Gulf

—Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

—Strong's (Hebrew & Chaldee Dictionary of the Old Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - Euphrates 19; 19

—Exhaustive Concordance (KJV Translation Frequency & Location)