elleborum
From LSJ
Σιγᾶν ἄμεινον ἢ λαλεῖν, ἃ μὴ πρέπει → Decet tacere quam loqui, quae non decet → Schweig besser still, als dass du sagst, was du nicht darfst
Latin > English
elleborum ellebori N N :: hellebore (plant); (considered a remedy for madness)
Latin > French (Gaffiot 2016)
ellĕbŏrum, v. helleborus, etc.