saxulum

σιγᾶν ἄμεινον ἢ λαλεῖν ἃ μὴ πρέπει → it's better to keep silence than to say what's not appropriate (Menander)

Latin > English (Lewis & Short)

saxŭlum: i, n.
dim. id.,
I a little rock: in asperrimis saxulis, Cic. de Or. 1, 44, 196.