An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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fluctuate
  افتاخیزیدن، افتاخیز کردن  
oftâxizidan, oftâxiz kardan (#)
Fr.: fluctuer  

To change continually; to shift back and forth; vary irregularly; to rise and fall in or as if in waves.

Etymology (EN): From L. fluctuationem (nom. fluctuatio), from fluctuare “to undulate,” from fluctus “wave,” from p.p. of fluere “to flow.”

Etymology (PE): Verbal form of oftâxiz, → fluctuation.