Save Gender Feminine Usage Turkish Pronounced Pron. ben-gi-soo [key] Other Forms FormsBengüsu, Mengüsu Meaning & History Means water of eternality, aqua vitæ, the water believed to give one eternal life. Derives from Old Turkic Beñgüsuv/Meñgüsuv consisting of Beñgü, Meñgü (eternal, everlasting, immortal) and Suv (water).