Charles Cullen posed a peculiar puzzle in "Linear Algebra and Differential
Equations": *Why is an eigenvalue like liverwurst?* Like pearls
before swine or caviary to the general, this query was little appreciated
by the would-be engineers struggling to fulfill their mathematics
requirement, and they would have hardly have been enlightened by
the answer in the back of the book: *Beide Woerter sind halb Englisch,
halb Deutsch*.

I have the impression that I got the impression from Professor Cullen that he thought this pair of words were unique in this respect. I can't recall now whether he ever said so, but I let myself think so for some years... although now I realize that with a little thought, it's possible to come up with a few more such examples.

And so our little "Liverwurst List":

- coffee klat(s)ch;
- eigenvalue;
- fun fest;
- iceberg;
- leitmotif;
- liverwurst;
- kindergarden;
- spinmeister;
- U boat;