Posted on 26th February 2021 by melyn Tybiethel is the Cornish word for theoretical Yes, theoretical in Cornish is tybiethel Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Kreyth is the Cornish word for scarsNext post: Madama is the Cornish word for madam