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
chazaq (Hebrew #2389)
strong (usu. in a bad sense, hard, bold, violent)
KJV usage: harder, hottest, + impudent, loud, mighty, sore, stiff(-hearted), strong(-er).
Pronounce: khaw-zawk'