Modern English words based on/rooted in obsolete English words?

...such as the word "ruthless". I think that most people know that it means



"without compassion", and that few of us know that its root word - "ruth" - is



an obsolete word meaning "compassion".



Makes sense, but I find it interesting that the root word fell into relative



disuse, while the word that is rooted in it is still in common usage today.



I figure that there are other examples of this type of situation, but none occur



to me.



Can any of you think of any?

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