An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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runoff
  رواناب  
ravânâb (#)
Fr.: ruissellement  

The water or other liquids that drains or flows from the land into streams and rivers, eventually into seas.

Etymology (EN): From → run + → off.

Etymology (PE): Ravânâb, literally “flowing water,” from ravân “flowing, running,” pr.p. of raftan “to go, walk; to flow” (Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- “to go; to attack” + âb, → water.