An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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coast
  رهارفتن  
rahâraftan
Fr.: accoster  

To move without further use of propelling power. → coasting flight, → coasting Universe.

Etymology (EN): M.E. coste, from O.Fr., from L. costa “rib, side,” cf. Mid.Pers. kust, kustag “side, direction; district,” Mod.Pers. xost, xwast “a beaten road; island;” PIE *kost- “leg, bone.”

Etymology (PE): Rahâraftan, from rahâ “free, set free”
(O.Pers. rad- “to leave,” Skt. rah-, rahati “separates, leaves,” Av. razah- “isolation;” PIE *redh-) + raftan “to go, walk” (Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- “to go; to attack”).