irrationalis
From LSJ
Βουλῆς γὰρ ὀρθῆς οὐδὲν ἀσφαλέστερον → Nam tutior res nulla consilio bono → Denn nichts führt weniger irre als ein guter Rat
Latin > English (Lewis & Short)
irrătĭōnālis: (inr-), e, adj. 2. in-rationalis,
I without reason, irrational (postAug.): animal, Quint. 7, 3, 3; 24; Sen. Ep. 113, 17; 118, 14; 124, 23: usus, mechanical exercises, Quint. 10, 7, 11: anima, Tert. Poen. 12.—Subst.: irrătĭōnālĭa, ĭum, n. plur., things or creatures without reason: de irrationalibus, Quint. 8, 6, 13.—Adv.: irră-tĭōnālĭter, irrationally, Tert. adv. Marc. 2, 6 al.
Latin > French (Gaffiot 2016)
irrătĭōnālis,¹³ e (in, rationalis), dépourvu de raison : Quint. 7, 3, 3 ; Sen. Ep. 113, 17