Posted on 9th July 2016 by melyn Trewesi is the Cornish word for forceful Yes, forceful in Cornish is trewesi Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Poster is the Cornish word for heavinessNext post: Strivyans is the Cornish word for contention