Posted on 14th May 2015 by melyn Gwethhe is the Cornish word for aggravate Yes, aggravate in Cornish is gwethhe Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Gorthuher is the Cornish word for eveningNext post: Dherag is the Cornish word for before