perarduus
From LSJ
Latin > English
perarduus perardua, perarduum ADJ :: very difficult
Latin > English (Lewis & Short)
pĕr-ardŭus: a, um, adj.,
I very difficult: mihi autem hoc perarduum est demonstrare, Cic. Verr. 2, 3, 71, § 166.
Latin > French (Gaffiot 2016)
pĕrardŭus,¹⁶ a, um, très difficile : Cic. Verr. 2, 3, 166.
Latin > German (Georges)
per-arduus, a, um, sehr schwierig, opus consideratā difficultate perarduum, Cassiod. inst. div. litt. 27 extr.: mihi autem hoc perarduum est demonstrare, Cic. Verr. 3, 166.
Latin > Chinese
perarduus, a, um. adj. :: 大難者