matrastra

From mātr- (“mother”) +‎ -astra (“wannabe”). Found in Imperial inscriptions and in the Reichenau Glossary.^[1]

mātrastra f (genitive mātrastrae); first declension (Late Latin)

1. stepmother
   • CIL XI 6730, 4:

     hic est Hirculis, qu[i] a matrastra sua / perivit^[2]

     This is Hercules, who died at the hands of his stepmother.

First-declension noun.

• patraster