Jim, thanks for the explanation of "klarts".

By "thread drift", I was referring to my post, and my post only --- I was apologising because I felt I might be derailing the thread by asking for the meaning of a word.

I will take it that the rest of your most recent post was addressed to someone other than myself, as I have not made any previous contribution to this discussion. Perhaps you overlooked the difference between "Gerry" and "Jerry". I don't know who Jerry is, but he or she isn't me.