Posted on 17th July 2013 by melyn Diwysygneth is the Cornish word for diligence Yes, diligence in Cornish is diwysygneth Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Karnival is the Cornish word for carnivalNext post: Kostrel is the Cornish word for flask