Posted on 28th June 2021 by melyn Penndomereth is the Cornish word for extremism Yes, extremism in Cornish is penndomereth Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Skrisel is the Cornish word for posterNext post: Duik is the Cornish word for blackish