quark (English noun) /kwɑːk/:
1. One of the most basic forms of matter that make up the heavier elementary particles. 2. A type of soft white cheese.
[source: Cambridge Advanced Learner’s Dictionary]
Quark (German noun)
1. A soft white foodstuff made from sour milk.
2. (slang) Nonsense, piffle, balderdash.
[Loosely translated from duden.com]