An Etymological Dictionary of Astronomy and Astrophysics

To form a → hypothesis.

Etymology (EN): Hypothesize, from hypothes(is), → hypothesis

• -ize a verb-forming suffix, from M.E. -isen, from O.Fr. -iser, from L.L. -izare, from Gk. -izein.

Etymology (PE): Engâré sâxtan, from engâré, → hypothesis

• sâxtan, sâzidan “to adapt, adjust, be fit; to build, make, fashion,” Mid.Pers. sâxtan, sâz-, Manichean Parthian s’c’dn “to prepare, to form,” Av. sak- “to understand, to mark,” sâcaya- (causative) “to teach.”
  Upâdâyanidan, infinitive from upâdâyan, → hypothesis.