perrarus
From LSJ
Latin > English (Lewis & Short)
per-rārus: a, um, adj.,
I very uncommon, very rare (as an adj. not in Cic.), Liv. 29, 38, 7: perrarum est, ut, etc., Plin. 31, 3, 23, § 38.—Adv.: perrārō, very seldom, very rarely: si quando id efficit, quod perraro potest. Cic. Rep. 2, 40, 67; id. Fin. 2, 16, 51; id. Rosc. Am. 18, 52: perraro haec alea fallit, Hor. S. 2, 5, 50.
Latin > French (Gaffiot 2016)
perrārus, a, um, très rare : Liv. 29, 38, 7 ; perrarum est ut Plin. 31, 38, il est très rare que.
Latin > German (Georges)
per-rārus, a, um, sehr selten, quod tum perrarum in mandandis sacerdotiis erat, Liv. 29, 38, 7: quando perrarum est, ut levior sit aliqua, Plin. 31, 38: condemnationes perraras esse iussit, Lampr. Alex. Sev. 21, 1.
Latin > English
perrarus perrara, perrarum ADJ :: very rare, exceptional