köken: Inherited from Middle Persian [Book Pahlavi needed] (ʾlwnd /arwand/, “swift, valiant; name of a river (literally "swift river"), perhaps the Tigris”), from Proto-Indo-Iranian *Hárwants (“fast, quick; a racehorse, courser”), from Proto-Indo-European *h₃ér-went-s, from *h₃er- (“to move (swiftly), to spring”). Cognate with Sanskrit अर्वन्त् (árvant), Avestan 𐬀𐬎𐬭𐬎𐬎𐬀𐬧𐬙 (aᵘruuaṇt).
بدین چوب شد روزگارم به سر ز سیمرغ وز رستم چارهگر فسونها و نیرنگها زال ساخت که اروند و بند جهان او شناخت