Posted on 10th October 2021 by melyn Issavonek is the Cornish word for substandard Yes, substandard in Cornish is issavonek Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Milva is the Cornish word for zooNext post: Renki is the Cornish word for croak