tough
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
English > Greek (Woodhouse)
adjective
P. and V. στερεός, Ar. and V. στερρός. V. στυφλός, περισκελής.
stubborn: P. and V. σκληρός, αὐθάδης.
tough as maple: Ar. σφενδάμνινος (Acharnians 181).
tough as oak: Ar. πρίνινος (Acharnians 180).