δυσαφής
From LSJ
ὁ μὴ δαρεὶς ἄνθρωπος οὐ παιδεύεται → spare the rod and spoil the child | οne who hasn't been flayed is not being taught | if the man was not beaten, he is not educated | the man, who was not paddled, is not educated
English (LSJ)
ές,
A hard to the touch, σάρξ Id.6.100.
Spanish (DGE)
-ές duro, áspero al tacto σάρξ Gal.6.100.