malefidus
From LSJ
Latin > English
malefidus malefida, malefidum ADJ :: faithless
Latin > English (Lewis & Short)
mălĕ-fīdus: a, um,
I adj., unfaithful, faithless, Boëth. Cons. Phil. 1, 1; 1, 17. (In class. Lat. always separately, as, capiti male fido, Ov. Ib. 85.)>
Latin > French (Gaffiot 2016)
mălĕfīdus, a, um [mieux en deux mots], peu sûr : Amm. 30, 7, 8.
Latin > German (Georges)
male-fīdus, a, um, unzuverlässig, unredlich, commentum (List), Amm. 30, 7, 8: colloquia, Rufin. Orig. in psalm. 36. homil. 3, 11.