Posted on 29th September 2021 by melyn Fethus is the Cornish word for smart Yes, smart in Cornish is fethus Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Kowlwerth is the Cornish word for wholesaleNext post: Medhegva is the Cornish word for clinic