Posted on 2nd May 201825th March 2018 by melyn Rath is the Cornish word for rat Yes, rat in Cornish is rath Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Deglena is the Cornish word for shiverNext post: Dynnargh is the Cornish word for greeting