Posted on 5th October 2012 by melyn Gwreydhyoleth is the Cornish word for radicalism Yes, radicalism in Cornish is gwreydhyoleth Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Ughelvar is the Cornish word for mistletoeNext post: Oksyjen is the Cornish word for oxygen