Random etymology: اسفين

In Jordan/Palestine, اسفين means someone telling the boss something bad you have done behind your back.

Et tu, Brute? حتى أنت يا بروتس؟  Και σύ, τέκνον Βροῦτε;
Image source: https://en.wikipedia.org/wiki/Et_tu,_Brute%3F

اسفين apparently comes from Ancient Greek σφήν (sphen)

Source: https://en.wiktionary.org/wiki/%D8%A5%D8%B3%D9%81%D9%8A%D9%86