leb (Hebrew #3820)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect; likewise for the centre of anything
KJV usage: + care for, comfortably, consent, X considered, courag(-eous), friend(-ly), ((broken-), (hard-), (merry-), (stiff-), (stout-), double) heart((-ed)), X heed, X I, kindly, midst, mind(-ed), X regard((-ed)), X themselves, X unawares, understanding, X well, willingly, wisdom.
Pronounce: labe
qasheh (Hebrew #7186)
severe (in various applications)
KJV usage: churlish, cruel, grievous, hard((-hearted), thing), heavy, + impudent, obstinate, prevailed, rough(-ly), sore, sorrowful, stiff((necked)), stubborn, + in trouble.
Pronounce: kaw-sheh'