Posted on 22nd August 2015 by melyn Lasnaghus is the Cornish word for teetotal Yes, teetotal in Cornish is lasnaghus Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Effeythadow is the Cornish word for efficientNext post: Tennlester is the Cornish word for tug-boat