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