petzen

Etymology 1
. Attested since the end of the 18th century, emerged in Halle, Germany, spread to all major German university cities by mid-19th century. Perhaps from Rotwelsch, , from , , from  +  ("pz" for ). Alternatively from, hence also the agent noun.

Verb

 * 1)  to tattle, snitch

Etymology 2
Variant of, from , of uncertain ultimate origin, but compare the origin of 🇨🇬.