Mutterschwester

From LSJ

τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies

Source

German > Latin

Mutterschwester, matertera. – od. umschr. soror matris. – meine M., soror matris meae.