Posted on 28th September 2013 by melyn Trenkles is the Cornish word for rhubarb Yes, rhubarb in Cornish is trenkles Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Porthorji is the Cornish word for gatehouseNext post: Neus is the Cornish word for threads