Posted on 29th July 2013 by melyn Ayrstanch is the Cornish word for airtight Yes, airtight in Cornish is ayrstanch Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Bleus is the Cornish word for flourNext post: Filosofieth is the Cornish word for philosophy