In*contro*ver"ti*bly

from The Collaborative International Dictionary of English v.0.48

Incontrovertible \In*con`tro*ver"ti*ble\, a.
   Not controvertible; too clear or certain to admit of dispute;
   indisputable. --Sir T. Browne. --
   {In*con`tro*ver"ti*ble*ness}, n. -- {In*con`tro*ver"ti*bly},
   adv.
   [1913 Webster]