קָשֶׁה

From LSJ

Ἔργων πονηρῶν χεῖρ' ἐλευθέραν ἔχε → Mali facinoris liberam serva manum → Von schlechten Taten halte deine Hände frei

Menander, Monostichoi, 148

English (Strong)

from קָשָׁה; severe (in various applications): churlish, cruel, grievous, hard((-hearted), thing), heavy, + impudent, obstinate, prevailed, rough(-ly), sore, sorrowful, stiff((necked)), stubborn, + in trouble.