Posted on 7th June 2021 by melyn Seythen is the Cornish word for week Yes, week in Cornish is seythen Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Barrgod is the Cornish word for bar-codeNext post: Strif is the Cornish word for strife