לֵב noun, masculine: inner man, mind, will, heart

• I.seldom of things in the midst of the sea
• II.elsewhere of men
  • 1.the inner man in contrast with the outer
  • 2.the inner man, soul, comprehending mind, affections and will
  • 3.specific reference to mind
  • 4.spec. reference to inclinations, resolutions and determinations of the will
  • 5.spec. reference to conscience
  • 6.[various]
  • 7.for the man himself
  • 8.as seat of appetites
  • 9.as seat of emotions and passions
  • 10.seat of courage

לֵב קָמָי

probably late Atbash.

לֵבָב noun, masculine: inner man, mind, will, heart

• I.seldom of things in the midst of the seas
• II.usually of men
  • 1.the inner man in contrast with the outer
  • 2.the inner man, soul, comprehending mind, affections and will
  • 3.specific reference to mind
  • 4.spec. reference to inclinations, resolutions, determinations of the will
  • 5.spec. reference to conscience
  • 6.spec. reference to moral character
  • 7.the man himself
  • 8.spec. as seat of appetites
  • 9.spec. of seat of the emotions and passions
  • 10.seat of courage

Strong's H3820 לֵב: the heart; also used (figuratively) very widely for the feelings, the will and even the intellect; likewise for the centre of anything
KJV:care for, comfortably, consent, × considered, courag(-eous), friend(-ly), ((broken-), (hard-), (merry-), (stiff-), (stout-), double) heart(-ed), × heed, × I, kindly, midst, mind(-ed), × regard(-ed), × themselves, × unawares, understanding, × well, willingly, wisdom.

Strong's H3824 לֵבָב: the heart (as the most interior organ)
KJV:bethink themselves, breast, comfortably, courage, ((faint), (tender-) heart(-ed), midst, mind, × unawares, understanding.

Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.