claustrarius
From LSJ
Latin > English (Lewis & Short)
claustrārĭus: a, um claustra,
I pertaining to locks: artifex, a locksmith, Lampr. Elag. 12.
Latin > French (Gaffiot 2016)
claustrārĭus, a, um, de serrure : claustrarius artifex Lampr. Hel. 12, 2, serrurier.