Posted on 14th May 2014 by melyn Trettya is the Cornish word for trample Yes, trample in Cornish is trettya Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Parledh is the Cornish word for parlourNext post: Gwiasva is the Cornish word for website