An Etymological Dictionary of the German Language/Thor

by Friedrich Kluge

Thor (1.), m., ‘fool,’ from MidHG. tôre, tôr, m., ‘insane person, fool’; *tôro, m., has not yet been found in OHG. The r of the adj. has originated in s (z), as is shown by OHG. tusîg, AS. dysig, ‘foolish,’ E. dizzy, and Du. duizelig, ‘dizzy.’ For further Teut. cognates of the Aryan root dhus (dhaus, dhwē̆s) see under Dusel; it is uncertain whether Lat. furere, ‘to rage,’ is derived from this root dhus. —

Thor (2.), n., ‘gate, gateway,’ from the equiv. MidHG. and OHG. tor, n.; corresponding to Goth. daúr, OSax. dor, n., ‘gate, door.’ See Thür.