Posted on 26th April 2018 by melyn Islonk is the Cornish word for abyss Yes, abyss in Cornish is islonk Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Arvreus is the Cornish word for criticismNext post: Avowadow is the Cornish word for justifiable