Posted on 13th October 2015 by melyn Trethtegys is the Cornish word for constipated Yes, constipated in Cornish is trethtegys Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Devnydhya is the Cornish word for utiliseNext post: Diber is the Cornish word for saddle