Posted on 16th January 2018 by melyn Bostyans is the Cornish word for boasting Yes, boasting in Cornish is bostyans Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Divagli is the Cornish word for disentangleNext post: Dooth is the Cornish word for prudent