somnificus

Latin > English (Lewis & Short)

somnĭfĭcus: a, um, adj. somnus-facio,
I causing sleep, narcotic (Plinian): crater, Mart. Cap. 1, § 82: medicamentum, Plin. 37, 10, 57, § 158: vis aspidum, id. 24, 4, 17, § 63.

Latin > French (Gaffiot 2016)

somnĭfĭcus, a, um (somnus, facio), soporatif, narcotique : Plin. 25, 150 || qui cause un engourdissement mortel : Plin. 29, 63.