Posted on 20th June 2015 by melyn Terosus is the Cornish word for disastrous Yes, disastrous in Cornish is terosus Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Sos is the Cornish word for friendNext post: Toulgist is the Cornish word for toolbox