ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → for extreme diseases, extreme methods of cure, as to restriction, are most suitable (Corpus Hippocraticum, Aphorisms 1.6.2)
stubbornness: P. αὐθάδεια, ἡ, σκληρότης, ἡ, Ar. and V. αὐθαδία, ἡ.
cruelty: P. and V. πικρότης, ἡ, ὠμότης, ἡ, V. τραχύτης, ἡ.