Rigour
Nuttall's Standard Dictionary of the English Language · 1890 · p. 155
rig'-ur, s.rigidne ; stiffne ; strictne ; severity; austerity; asperity; a sense of chilline with shivering [Med.] (L. rigel, to be stiff.)
Bu kavram başka kaynaklarda da geçiyor
Chamber's Twientieth Century Dictionary (1908)
Readham'da tam maddeyi gor →