The wonder of words.

You know me - I'm a sucker for words and their meanings.  "Ruthless" is a word that (sadly) has been much in the news lately, and I wondered if it was one of those "unpaired words" we discussed on 11th March last year.  But no - there is such a word as "ruth" - archaic now, but it means compassion or pity.  But the etymological journey doesn't stop there, because ruth is the noun which comes from the verb "to rue", meaning to regret or feel remorse.  And that word is still current, although now used almost exclusively in the expression "to rue the day..."