desuetus
From LSJ
Ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → It is impossible to know the spirit, thought, and mind of any man before he be versed in sovereignty and the laws
Latin > English
desuetus desueta, desuetum ADJ :: disaccustomed; that has fallen out of use or become unfamiliar
Latin > English (Lewis & Short)
dēsŭētus: a, um, Part., from desuesco.
Latin > French (Gaffiot 2016)
dēsuētus, a, um, v. desuesco.