What is half of a zwei?

Answer 1

-- "Zwei" is German for "two". I presume, then, that half of a "zwei" would be an "ein" (German for "one"). --

Nix punkte but gut try: the first half of a zwei is a "zw", as in Zwieback (rusks), Zwillinge (two or more blonde sisters); the "ei" is an egg, as in Eiland (isle:egg-land), etc.