nundina
From LSJ
Ἡ γλῶσσ' ἁμαρτάνουσα τἀληθῆ λέγει → Inesse linquae veritas lapsae solet → Die Zunge, wenn sie in die Irre geht, spricht wahr
Latin > English
nundina nundinae N F :: market day (pl.); traffic; [novem+dies => held every ninth day]
Latin > English (Lewis & Short)
nundĭna: ae, f., v. nundinus, II.
Latin > French (Gaffiot 2016)
(2) nūndĭna, æ, ī, c. nundinæ : Sid. Ep. 7, 5.