An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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rationalism
  راین‌باوری، خردباوری  
râyan-bâvari, xerad-bâvari
Fr.: rationalisme  

A philosophical doctrine that holds that → reason alone, unaided by experience, can arrive at basic truth regarding the world.

Etymology (EN): From → rational + -ism a Gk. suffix used in the formation of nouns denoting action or practice, state or condition, principles, doctrines, and so forth.

Etymology (PE): Râyan, → reason; xerad, → rational; bâvari, from bâvar “belief” (Mid.Pers. wâbar “beleif;” Proto-Iranian *uar- “to choose; to convince; to believe;” cf. Av. var- “to choose; to convince” varəna-, varana- “conviction, faith;” O.Pers. v(a)r- “to choose; to convince;” Skt. vr- “to choose,” vara- “choosing”).